Do you know the difference between an iFrame and an overlay? What about a jpg and png? Find out by using the below feature to search through our Web Design Glossary.
The glossary is being updated all the time. If you think there is anything missing, please get in touch to let us know at justin@theonlineadvertisingguide.com
Please note: The below contains terms related to web design, acronyms of web design terms, abbreviations of web design terms, and synonyms of web design terms!
If you’re looking for something specific, we recommend you use the search box.

a
- Above The FoldWhat does Above The Fold mean? Above The Fold in online advertising (or ATF) refers to the... Learn More >
- A/B TestingA/B Testing (or split testing) is where you show two different variants of something (an ad or... Learn More >
- Adobe FlashAdobe Flash was an animation program that was commonly used for advertising. It was finally... Learn More >
- Ad SpaceA space on a website that is reserved for advertising.
- Ad SpecsAd Specs are the requirements a website/network places on advertisers to allow their ad to run.... Learn More >
- Alt TagA bit of text that is attached to an image on a webpage appears when the image doesn't load.... Learn More >
- Animated GifA Gif that cycles through different images. Gif is an acronym that stands for graphic... Learn More >
- ARAugmented Reality is a way of digitally adding more details to an image recorded on a camera in... Learn More >
- ATFWhat does Above The Fold mean? Above The Fold in online advertising (or ATF) refers to the... Learn More >
- Augmented RealityAugmented Reality is a way of digitally adding more details to an image recorded on a camera in... Learn More >
b
- Backup GifA Backup Gif is the Gif version of an ad that is provided alongside a more complicated version... Learn More >
- Below The FoldThe term Below The Fold (or BTF) means the space on a webpage that can only be seen once a user... Learn More >
- BreadcrumbsA hierarchical way of describing to a user where they are on the site (usually with hyperlinks).... Learn More >
- BrowserA browser is a piece of software that allows users to view web pages (you are using one right... Learn More >
- BTFThe term Below The Fold (or BTF) means the space on a webpage that can only be seen once a user... Learn More >
c
- CanvaA popular and simple design tool that can be accessed through a browser. Canva has a large... Learn More >
- Cascading Style SheetsCSS stands for Cascading Style Sheets and is a programming language used to make websites.
- ClickableAnything that can be clicked on, where that click causes a response. For example, clicking on... Learn More >
- CLSCumulative Layout Shift is one of Google’s Core Web Vital metrics, which is to be used as a... Learn More >
- CMSCMS stands for Content Management System. It refers to any program that is used to manage a... Learn More >
- Conditional ContentConditional Content is content on a webpage or email that only appears when certain criteria are... Learn More >
- Confirmation PageA confirmation page is the page a user sees after completing an action that confirms that action... Learn More >
- ContentContent is a generic term for stuff on the internet, such as posts, articles, videos, pictures etc.
- Content Management SystemCMS stands for Content Management System. It refers to any program that is used to manage a... Learn More >
- Conversion RateThe Conversion Rate (CR) of a campaign is the number of conversions achieved per click. It is... Learn More >
- CookieA cookie is usually a way for a webpage to store a small amount of information on your computer... Learn More >
- CRThe Conversion Rate (CR) of a campaign is the number of conversions achieved per click. It is... Learn More >
- Creative AgencyA Creative Agency is a company that creates advertising on behalf of other companies. They... Learn More >
- CSSCSS stands for Cascading Style Sheets and is a programming language used to make websites.
- Cumulative Layout ShiftCumulative Layout Shift is one of Google’s Core Web Vital metrics, which is to be used as a... Learn More >
d
- Dark PatternsDark Patterns are techniques used by websites and apps to trick their users into taking an... Learn More >
- DeliverablesThe specific tangible results of a project. In marketing, deliverables can mean things like... Learn More >
e
- EmojiA standard set of small images that can be added to messages and posts that is used to express... Learn More >
- ExperienceA marketing buzzword that tries to encapsulate how enjoyable and easy to use something was. This... Learn More >
f
- FAQsFAQs stands for Frequently Asked Questions. It is a section added to most websites to improve... Learn More >
- FaviconThe icon that appears on a tab in a browser when visiting a website. Usually just the websites logo.
- FIDFirst Input Delay is one of Google's Core Web Vital metrics, which is to be used as a ranking... Learn More >
- File ExtensionA file extension is the label your computer reads to understand what sort of file it is dealing... Learn More >
- First Input DelayFirst Input Delay is one of Google's Core Web Vital metrics, which is to be used as a ranking... Learn More >
- Flash AdAn ad made using Adobe Flash which is usually animated and can be interactive. These types of... Learn More >
- FoldThe bottom edge of a browser: the area above is what a user sees when they first load a webpage,... Learn More >
- Frequently Asked QuestionsFAQs stands for Frequently Asked Questions. It is a section added to most websites to improve... Learn More >
g
- Gated ContentGated content refers to any webpages which require something before you are allowed to use it.... Learn More >
- GifA type of image file, which can be animated. Gif is an acronym that stands for graphic... Learn More >
- Graphic Interchange FormatA type of image file, which can be animated. Gif is an acronym that stands for graphic... Learn More >
h
- Hamburger MenuA common feature of websites (including this one), where the menu button is simply shown as... Learn More >
- Hero ImageA Hero Image is a large (possibly oversized) image that dominates the top of a website, often... Learn More >
- Hidden IframeA hidden iframe is an iframe that is made invisible to users by being made incredibly small or... Learn More >
- HomepageThe front page of a website (where you go when you type in the URL). Occasionally abbreviated to HP.
- Horizontal Ad UnitAn ad unit that is wider than it is tall. It is useful to group ad units in this way for... Learn More >
- HPThe front page of a website (where you go when you type in the URL). Occasionally abbreviated to HP.
- HTMLHTML is the name of the code webpages are written in. Although there are other types of code... Learn More >
- Hyper Text Markup LanguageHTML is the name of the code webpages are written in. Although there are other types of code... Learn More >
i
- IEMade by Microsoft, Internet Explorer is one of the oldest browsers available. It has now been... Learn More >
- Iframeiframe is an abbreviation of inline frame and is an innovation by Internet Explorer to display... Learn More >
- Infinite ScrollInfinite Scroll refers to a feature on websites where a user can continue scrolling down a page... Learn More >
- InlineA way of including code (such as CSS) directly in the body of a program (or webpage). While this... Learn More >
- Internal LinkAn internal link simply means a link that goes from one page within a site to another page... Learn More >
- Internet ExplorerMade by Microsoft, Internet Explorer is one of the oldest browsers available. It has now been... Learn More >
j
- JavaScriptJavaScript is a type of code used for programming on the web. It is one of the three main types... Learn More >
- Joint Photographic Experts Groupjpg is the file extension abbreviation of a JPEG image file. JPEG stands for Joint Photographic... Learn More >
- jpgjpg is the file extension abbreviation of a JPEG image file. JPEG stands for Joint Photographic... Learn More >
- jQueryjQuery is a JavaScript library that makes it much easier to use JavaScript in a variety of ways.
- jsJavaScript is a type of code used for programming on the web. It is one of the three main types... Learn More >
- Jump PageA jump page is a microsite that opens after clicking on an ad. It is essentially a pop-up ad... Learn More >
k
- KerningKerning is the process of altering the space between letters to make text easy to read and nice... Learn More >
- K-WeightIn Digital Marketing, K-Weight refers to the size of an ad or piece of content in kB... Learn More >
l
- Landing PageThe page where a person enters a website (ie the page they "land on"). In online advertising,... Learn More >
- LatencyThe time between a user action (such as a click) and the corresponding reaction on a webpage... Learn More >
- Lazy LoadingIn display advertising, lazy loading refers to not loading an ad until it is set to appear on a... Learn More >
- Link RotLink Rot means when links on a website stop working over time. This happens primarily when: ... Learn More >
m
- Meta DescriptionA Meta Description is a summary of a webpage that doesn't appear on the page. It is instead read... Learn More >
- MicrositeA microsite is a website made for a specific purpose, often by a company that already has a... Learn More >
- Multi-Size Ad SlotAn ad slot that can load more than one size of advert within it.
n
- Native AdvertisingNative Ads are ads that are intended not to look like ads. For example, they could be an... Learn More >
- Nested CommentsWhen a reply to a comment is slightly indented or hidden under the comment it is replying to (so... Learn More >
- Non-Standard Ad UnitIn the Preparing Your Site section we told you to stick with IAB standard ads. This was because... Learn More >
o
- OverlayWhat is an Overlay (or Floater)? An Overlay (or Floater as they are known in the US) is an IAB... Learn More >
p
- PHPPHP is a programming language used on the internet.
- PixelA pixel is what makes up the images displayed on your computer. They are minute dots of colour,... Learn More >
- PNGA png is a type of image file (with the file extension .png). It is one of the best types of... Learn More >
- Polite LoadingPolite Loading is a common requisite made by websites for ads on their site meaning that ads are... Learn More >
- Portable Network GraphicsA png is a type of image file (with the file extension .png). It is one of the best types of... Learn More >
- Product ListA place where products are listed, such as in search results, category pages, sales pages etc.... Learn More >
- Publisher Ad TagA publisher ad tag is a piece of code that publishers put directly on their site to call ad... Learn More >
r
- ReskinWhat is a Reskin? A reskin is a branded image that replaces the background of a website. It... Learn More >
s
- Sales Confirmation PageA sales confirmation page is a webpage that confirms a purchase has been made online. It appears... Learn More >
- Scroll HijackingWhen scrollbars are made to behave differently than usual (for example stopping at a point and... Learn More >
- SitemapA sitemap is a list of all the web pages on a site, arranged in a useful manner.
- Social ProofA way of expressing that people like/agree with an action, often by using usage stats. For... Learn More >
- Style GuideA Style Guide is a manual that specifies the house style of a business. It typically includes... Learn More >
t
- Tagged Image File FormatA TIFF is a type of image file (.TIFF is the file extension). TIFF stands for Tagged Image File... Learn More >
- Third-Party CookiesCookies that are dropped onto a person's computer when visiting a website that are not from the... Learn More >
- TIFFA TIFF is a type of image file (.TIFF is the file extension). TIFF stands for Tagged Image File... Learn More >
- TroubleshootingThe process of systematically testing for, finding and fixing problems (such as broken ads,... Learn More >
w
- Web AccessibilityA way of judging whether a website has been developed so that people with disabilities can use it.
- Web AppA Web App is a website which functions like a program (such as Netflix for example).
- Web DesignWeb Design is the process of deciding what a website (or any thing that is put on the internet)... Learn More >
- Web DesignerA Web Designer is someone who designs websites (and anything that goes on the internet really).... Learn More >
- WebpageAn individual page on a website.
- What You See Is What You GetPronounced whizzy-wig, this acronym stands for What You See Is What You Get. It refers to a... Learn More >
- WYSIWYGPronounced whizzy-wig, this acronym stands for What You See Is What You Get. It refers to a... Learn More >
x
- XML SitemapAn XML Sitemap is a file that lists all of a sites URLs so that Search Engines can properly... Learn More >
z
- Z-IndexThe Z-Index is a CSS property that defines the order in which items on a webpage are shown - if... Learn More >
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