SEO and growth glossary

I Terms and Definitions

55 plain-English definitions begin with I. Showing page 1 of 2.

All I definitions

IDN: Common abbreviation for Internationalized Domain Name.
Iframe: An HTML element that embeds another document within the current page.
Image alt text: Alternative text describing an image for accessibility and image search.
Image anchor: A hyperlink whose visible content is an image rather than text.
Image caption: Visible text accompanying an image, often used to provide context.
Image carousel: A SERP feature displaying multiple images in a horizontally scrollable list.
Image dimensions: The pixel width and height of an image.
Image file name: The filename of an image, used as a minor relevance signal in image search.
Image format: The encoding of an image file, such as JPEG, PNG, WebP, or AVIF.
Image pack: A SERP feature presenting a row or grid of images relevant to the query.
Image SEO: Optimization of images for relevance, performance, and accessibility.
Image sitemap: A sitemap or sitemap extension that exposes image URLs to crawlers.
Image tag: The HTML img element used to display an image.
Image title attribute: The deprecated HTML title attribute on an image, formerly shown as a tooltip.
ImageObject schema: A schema.org type used to mark up image resources.
Impression: A single instance of a page or result being shown to a user in search results.
Impression growth: The increase in impressions for a page or query over a period.
Inbound link: Another name for a backlink, an incoming hyperlink from another site.
Incremental static regeneration: A Next.js rendering pattern that regenerates static pages on demand after deployment.
Index: The collection of pages a search engine has stored and made eligible for retrieval.
Index coverage report: A historical Search Console report showing index status, replaced by the page indexing report.
Indexability: The extent to which URLs on a site are eligible to be added to a search engine's index.
Indexifembedded directive: A robots meta value allowing indexing only when the page is embedded in another indexable document.
Indexing: The process of storing fetched pages in a search engine's index for later retrieval.
Infinite scroll: A pattern that loads new content as the user scrolls down, requiring care for crawlability.
Infinite URL space: A site condition that generates endless unique URLs, typically caused by parameters or filters.
Information architecture: The structural design of a site's content for findability and usability.
Informational intent: Search intent in which the user is looking for information rather than a transaction.
Inline code: Short code rendered inline using the HTML code element.
Inline image: An image rendered within the body of a page rather than as a hero or banner.
INP: Interaction to Next Paint, the Core Web Vitals metric measuring responsiveness across a visit.
Input element: The HTML input element used to capture user input within a form.
Interaction to Next Paint: The Core Web Vitals metric measuring responsiveness across the duration of a user's visit.
Internal link: A hyperlink from one page on a site to another page on the same site.
Internal linking: The practice of placing links between pages on the same site to support navigation and ranking flow.
Internal links report: A Search Console report showing top internally linked pages and their link counts.
Internal PageRank: An estimation of PageRank flowing through a site's internal link graph alone.
Internal site search: A site's own search functionality used by visitors to find on-site content.
International SEO: SEO across multiple countries, languages, or regions, including hreflang and geo configuration.
International site structure: The architecture of a multinational site, typically using subfolders, subdomains, or ccTLDs.