Glossary of Terms
We have compiled this list of terms and definitions to help you better understand the terminology used within the web development community.
SEO Glossary
There are 18 entries in this glossary.
Image Alt Image Alt checks that every <img> element has an alt attribute with meaningful alternative text (or an empty alt="" for purely decorative images). Missing alt text makes images invisible to screen reader users and harms SEO image indexing.
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Alternative Text |
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Image Alt CheckImage Alt Check is the process of verifying that every image on a page has appropriate alternative text. Informative images need a meaningful description, while decorative images should be marked so screen readers skip them. A solid alt-text review improves both accessibility and search visibility.
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Alt Text Audit, Missing Alt Check |
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Image Alt TextImage Alt Text is a short description that tells users and search engines what an image shows when it cannot be seen or loaded. It is essential for screen reader users and helps with search rankings. The best alt text is brief, descriptive, and avoids keyword stuffing.
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Alt Tag, Image Description, Alt Attribute |
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Image Aspect RatioImage Aspect Ratio management makes sure images display at the correct proportions before they finish loading. Without declared dimensions, images can cause the page layout to jump around as they pop in. Setting proper aspect ratios prevents layout shifts and keeps the page looking stable.
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Image Proportions, Width/Height Ratio |
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Improve Image DeliveryImprove Image Delivery evaluates whether images are served in modern formats (WebP, AVIF), properly sized for the display, and compressed efficiently. Large, unoptimized images are the number-one cause of slow page loads on most websites.
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Image Optimization, Optimize Images, Image Compression |
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Index/Nofollow BalanceIndex/Nofollow Balance is about controlling which pages search engines can see and which links pass authority. A good setup keeps your important pages indexable and lets links flow naturally, while blocking low-value or sensitive pages. Poor balance can accidentally hide important content from search.
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Index Control, Robots Directives |
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IndexingIndexing is the process search engines use to organize and store web pages so they can return relevant results quickly. Before a page can appear in search results, it needs to be crawled and then added to the search engine's index. If a page is not indexed, it simply will not show up in searches.
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Google Index, Search Database |
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Inline CSSInline CSS is styling code placed directly inside your HTML rather than in a separate stylesheet. A small amount can help pages render faster on first load, but too much makes your code harder to maintain and harder for browsers to cache. Keeping inline styles minimal is usually the better approach.
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Inline Styles, Style Attribute |
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Input Accessible NameInput Accessible Name means every form field has a clear label that screen readers can announce. Without one, users hear an unlabeled text box and have no idea what information to enter. Good input labels improve form completion rates and reduce errors for everyone.
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Input Label, Form Field Name |
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Input Image AltInput Image Alt means image-based form buttons, like graphical submit buttons, need descriptive text so assistive tools can announce what they do. Without it, screen reader users encounter a mystery button with no context. Adding a clear description makes these controls usable for everyone.
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Image Button Alt, Submit Button Label |
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Inspector IssuesInspector Issues are warnings that show up in browser developer tools, flagging potential problems with quality, compatibility, or performance. Fixing them early prevents subtle bugs from reaching your live site. Treating inspector warnings as a routine check helps maintain overall site health.
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Dev Tools Warnings, Console Errors |
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Interaction to Next PaintInteraction to Next Paint is a Core Web Vital that measures how responsive a page feels throughout a visit. It tracks the delay between user actions like clicks or taps and the screen actually updating. A low score means the page feels fast and responsive to every interaction.
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INP, Responsiveness |
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Interactive Element AffordanceInteractive Element Affordance is how clearly a button, link, or control communicates that it can be clicked or tapped. If something looks like plain text but is actually clickable, users will miss it. Strong visual cues reduce confusion and help people interact with your site confidently.
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Clickable Appearance, Button Affordance |
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Internal CSSInternal CSS is styling code written directly inside your HTML page rather than in an external file. It works for page-specific tweaks, but overusing it leads to repetition and weaker browser caching. Keeping most of your styles in external files improves performance and maintainability.
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Embedded Styles, Style Tag |
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Internal vs External LinksInternal vs External Links describes the mix of links pointing within your own site versus links going to other websites. Good internal linking helps search engines discover your pages and helps visitors navigate. External links should point to trustworthy, relevant sources.
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Link Mix, Outbound Links, Interlinking |
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IP CanonicalizationIP Canonicalization ensures that visitors and search bots who access your site through its raw IP address get redirected to your proper domain name. Without this, the same content can appear under two different addresses, confusing search engines. A simple redirect fixes the issue.
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IP Redirect, IP to Domain Redirect |
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Is CrawlableIs Crawlable checks whether search engine bots can actually access and read your page. If a page is blocked by robots rules, returns an error, or cannot render, it will never appear in search results. Crawlability is the most basic requirement for organic search visibility.
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Crawlability, Bot Access, Indexability |
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Is on HTTPSIs on HTTPS confirms that your page is served over a secure, encrypted connection. HTTPS protects user data, builds trust, and is a baseline requirement for modern browsers and search engines. Sites still on plain HTTP may show security warnings and miss out on ranking benefits.
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HTTPS, Secure Site, SSL Enabled |
What Does "Liquid Purple" mean?
noun | / LIK-wid PUR-pul /
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(biochemistry) Also known as visual purple or rhodopsin — a light-sensitive receptor protein found in the rods of the retina. It enables vision in dim light by transforming invisible darkness into visible form. Derived from the Greek rhódon (rose) and ópsis (sight), its name reflects its delicate pink hue and vital role in perception.
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(modern usage) Liquid Purple — a website management agency specializing in uncovering unseen opportunities and illuminating brands hidden in the digital dark. Much like its biological namesake, Liquid Purple transforms faint signals into clear visibility — revealing what others overlook and bringing businesses into the light.
Origin: From the scientific term rhodopsin, discovered by Franz Christian Boll in 1876; adopted metaphorically by a web development firm dedicated to visual clarity in the age of algorithms.
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