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Glossary A–Z

Terms starting with R

30 terms. Search all 545 terms →

Web Development

REST API

A REST API lets software systems exchange data over the web using standard HTTP requests. It connects your site to the services your business relies on.Read definition →PPC

ROAS

ROAS is the revenue earned for every dollar spent on advertising. ROAS is the honest scoreboard for paid advertising. It shifts the conversation from clicks to.Read definition →Analytics

ROI

ROI, or return on investment, measures the profit an investment earns relative to its cost. It proves whether marketing spend is making or losing money.Read definition →SEO

Rank Tracking

Rank tracking is the ongoing monitoring of a website's positions for target keywords in search results. It turns SEO effort into clear, measurable progress.Read definition →SEO

RankBrain

RankBrain is a Google machine-learning system that helps interpret search queries. RankBrain rewards content that satisfies intent over exact keywords.Read definition →Tech Stack

RankMath

RankMath is a WordPress SEO plugin that competes with Yoast, with a wide set of features. RankMath manages search fundamentals from one central dashboard.Read definition →Web Development

Rate Limiting

Rate limiting caps how many requests a user or client can make in a set time window. It protects your servers from abuse, overload, and runaway hosting costs.Read definition →Social Media

Reach

Reach is the number of unique people who see your social content. Tracking reach shows how far your message travels and how fast your audience grows.Read definition →Web Development

React

React is a popular JavaScript library for building fast, interactive user interfaces. It powers a large share of modern web apps and single-page sites.Read definition →PPC

Real-Time Bidding

Real-time bidding auctions each ad impression individually in the moment a page loads. It lets advertisers value every impression, powering programmatic buying.Read definition →SEO

Reciprocal Link

A reciprocal link is a mutual link exchange between two websites. Excessive reciprocal linking looks manipulative to Google and can weaken its SEO value.Read definition →SEO

Reconsideration Request

A reconsideration request asks Google to review a site after a manual penalty is fixed. A successful request can restore lost rankings and organic traffic.Read definition →SEO

Redirect Chain

A redirect chain is a sequence of two or more redirects a browser follows before reaching the final page. Chains slow load times and leak ranking signals.Read definition →Tech Stack

Redis

Redis is an open source, in-memory data store used as a cache, database, and message broker. Redis serves cached data in milliseconds to keep busy apps fast.Read definition →Social Media

Reel

A reel is a short, vertical video format built for entertainment and discovery. Reels earn outsized organic reach and attract new followers fast.Read definition →Analytics

Referral Traffic

Referral traffic is visitors who reach your site from a link on another website. It shows which partnerships and mentions are actually sending you visitors.Read definition →SEO

Referring Domain

A referring domain is a unique website that links to yours. Referring domains often matter more than raw backlink counts for SEO authority and rankings.Read definition →Web Development

Regular Expression

A regular expression is a pattern used to search, match, and manipulate text. It powers validation, find-and-replace, and data parsing across the web.Read definition →PPC

Remarketing

Remarketing shows ads to people who already visited your site or app but did not convert, bringing them back to finish the action. It targets warm audiences.Read definition →SEO

Render-Blocking Resource

A render-blocking resource is a file that must load before the browser can display a page. Reducing them speeds up first paint and improves Core Web Vitals.Read definition →Web Design

Responsive Design

Responsive design is an approach where a website's layout adapts to fit any screen size. A site that breaks on mobile loses customers and rankings. Responsive.Read definition →PPC

Responsive Search Ad

A responsive search ad lets you supply multiple headlines and descriptions that Google mixes and tests automatically to find the best combination per query.Read definition →PPC

Retargeting

Retargeting shows ads to people who previously visited your site but did not convert. Most first-time visitors do not convert. Retargeting brings them back.Read definition →AI / GEO

Retrieval-Augmented Generation

Retrieval-augmented generation lets an AI pull in outside data before answering, so responses stay current and grounded in real sources, cutting made-up facts.Read definition →Web Development

Reverse Proxy

A reverse proxy is a server that sits in front of your web servers and forwards client requests to them. It adds security, caching, and load balancing.Read definition →SEO

Review Schema

Review schema is structured data that marks up ratings and reviews so search engines can show star ratings in results. Those stars lift trust and click-through.Read definition →SEO

Rich Snippet

A rich snippet is a search result enhanced with extra detail like star ratings or prices. Rich snippets make your listing stand out and win more clicks.Read definition →SEO

Robots.txt

Robots.txt is a file that tells search engine crawlers which parts of a site they may access. Robots.txt guides crawlers and protects crawl budget, but.Read definition →Web Development

Rollback

A rollback reverts a website or app to a previous working version after a bad deploy. Rollbacks limit downtime and protect users from broken releases.Read definition →Web Design

Rule of Thirds

Rule of thirds divides a layout into a 3x3 grid, placing key elements along the lines to create balance. It guides the visitor's eye to what matters.Read definition →