External Links are hyperlinks that point at (target) any domain other than the domain the link exists on (source). In layman's terms, if another website links to you, this is considered an external link to your site. Similarly, if you link out to another website, this is also considered an external…| Moz
If search engines literally can't find you, none of the rest of your work matters. This chapter shows you how their robots crawl the Internet to find your site and put it in their indexes.| Moz
Page Authority (PA) is a score developed by Moz that predicts how well a specific page will rank on search engine result pages (SERP). Page Authority scores range from one to 100, with higher scores corresponding to a greater ability to rank.| Moz
Within SEO, link building plays an important role in driving organic traffic via search engines, especially in competitive industries. When combined with strong technical SEO foundations, great on-page SEO, excellent content, and a good user experience, link building can be super effective at driving more organic traffic. | Moz
The way your page is optimized has a huge impact on its ability to rank. The following are the top on-page ranking factors that can affect your website's search visibility: title tags, meta descriptions, on-page content, internal links, URL structure, header markup, alt text, etc.| Moz
An HTTP status code is a server response to a browser’s request. When you visit a website, your browser sends a request to the site’s server, and the server then responds to the browser’s request with a three-digit code: the HTTP status code. Common codes are: 1xx Informational requests, 2xx…| Moz
Robots.txt is a text file webmasters create to instruct robots (typically search engine robots) how to crawl & index pages on their website. The robots.txt file is part of the robots exclusion protocol (REP), a group of web standards that regulate how robots crawl the web, access and index content,…| Moz
Backlinks are created when one website links to another. Backlinks are especially valuable for SEO because they represent a "vote" that can help you to rank. Learn more about backlinks and SEO.| Moz
Anchor text is the clickable (often blue) text in a hyperlink. It's SEO best practice to write anchor link text that's descriptive and relevant to the page you're linking to.| Moz
A redirect sends users (and search engines) to a different URL from the one they originally requested. 301, 302, and meta refresh redirects are the most common. There are several ways to set up redirection, read more to see which is right for you.| Moz
Domain Authority is Moz's best estimate of how well a domain will perform in organic search results. Learn how Domain Authority is calculated and why it's important to SEO.| Moz
Internal Links are hyperlinks that point to another webpage (or resource) on the same website/domain. Hyperlinks are either 'external' or 'internal' depending on their target URL destination. Internal links are most useful for establishing a strong website architecture and spreading link equity.| Moz
