---
title: "SEO Fundamentals — glossary category"
description: "Core concepts every SEO practitioner needs to know"
url: "https://skribra.com/glossary/category/seo-fundamentals"
type: "index"
---

# SEO Fundamentals

Core concepts every SEO practitioner needs to know

- [Backlink](https://skribra.com/glossary/backlink): A hyperlink from one website pointing to a page on another website, used by search engines as a signal of authority and trust.
- [Domain Authority](https://skribra.com/glossary/domain-authority): A third-party score (0–100) developed by Moz that predicts how likely a website is to rank in search engine results pages based on its backlink profile.
- [SERP](https://skribra.com/glossary/serp): The page Google or another search engine displays in response to a user's query, containing organic results, paid ads, and rich features like featured snippets, image packs, and knowledge panels.
- [Organic Traffic](https://skribra.com/glossary/organic-traffic): Website visitors who arrive through unpaid search engine results, as opposed to paid ads, social media, direct visits, or referral links.
- [PageRank](https://skribra.com/glossary/page-rank): Google's original algorithm that assigns a numerical importance score to web pages based on the quantity and quality of links pointing to them, treating each link as a 'vote' of confidence.
- [Anchor Text](https://skribra.com/glossary/anchor-text): The clickable, visible text of a hyperlink — the words a user sees and clicks to follow a link, which signals to search engines what the destination page is about.
- [Keyword Stuffing](https://skribra.com/glossary/keyword-stuffing): The practice of overloading a web page with keywords or keyword phrases in an attempt to manipulate search rankings — a technique Google explicitly classifies as spam.
- [Duplicate Content](https://skribra.com/glossary/duplicate-content): Substantively identical or very similar content that appears on multiple URLs, either within the same site or across different sites, which can confuse search engines about which version to index and rank.
- [301 Redirect](https://skribra.com/glossary/301-redirect): An HTTP status code that permanently redirects one URL to another, telling browsers and search engines that the original page has moved and passing the majority of its link equity to the new destination.
- [Nofollow](https://skribra.com/glossary/nofollow): A link attribute (`rel='nofollow'`) that instructs search engines not to follow a link or pass link equity (PageRank) to the destination URL.
- [Thin Content](https://skribra.com/glossary/thin-content): Web pages that offer little or no value to users — characterized by very low word count, auto-generated text, scraped content, or pages that are essentially duplicates of other pages with minimal original substance.
- [Page Authority](https://skribra.com/glossary/page-authority): A proprietary score developed by Moz (0–100) that predicts how well a specific page will rank in search engine results, based primarily on its backlink profile.

## Machine-readable index

- HTML version of this page: https://skribra.com/glossary/category/seo-fundamentals
- Site index for agents: https://skribra.com/llms.txt
- Sitemap: https://skribra.com/sitemap.xml
- Public REST API: https://skribra.com/api/v1
- OpenAPI specification: https://skribra.com/openapi.json