Majestic is the world＇s leading link data analysis platform, specializing in crawling and analyzing website backlink data. Its core strengths lie in its massive link index database and unique link quality evaluation system. As an important metric for measuring website authority and link quality, it has long been highly regarded by SEO professionals.

1. Trust Flow is a trademark of Majestic, representing a score based on link quality, expressed as a numerical value between 0 and 100. Based on manual reviews of the internet, Majestic has compiled a list of trusted seed sites. This process forms the basis of Majestic＇s Trust Flow metric. Sites closely connected to these trusted seed sites receive higher scores, while sites that may have suspicious links receive much lower scores.

2. Citation Flow is a trademark of Majestic, representing a score based on the quantity of backlinks, expressed as a numerical value between 0 and 100. Citation Flow is a metric used to measure the amount of ＂link equity＂ or ＂influence＂ a website or link possesses, with scores ranging from 0 to 100. Citation Flow is intended to be used in conjunction with Trust Flow. Together, Citation Flow and Trust Flow constitute Majestic＇s Flow Metrics algorithm.

3. Backlink refers to a link from another website pointing to your website. In English, it is sometimes also referred to as an ＂Inbound Link.＂ When writing an article and mentioning relevant information or quoting someone else＇s work, you might add a hyperlink pointing to their website, allowing interested readers to visit that site. Such a hyperlink is a backlink for that website.

4. Referring Domains refer to the total number of unique domains from which a website＇s backlinks originate. This differs from the aforementioned Backlinks (total link count). If a website has 1000 backlinks from only a single domain, then the Backlinks count is 1000, while the Referring Domains count is 1. This data highlights the importance of diversifying your backlink profile across many different domains.

5. Ref IPs and **Ref Subnets** are even more stringent metrics for evaluating backlink quality than Referring Domains. Ref IPs refers to the number of unique IP addresses from which backlinks originate. Ref Subnets refers to the number of unique IP subnets from which backlinks originate. These two metrics can more accurately reflect the independence and naturalness of backlink sources.

6. Indexed URLs refer to the number of web pages from a site that are included in a search engine＇s index. **Crawled URLs** refer to the number of web pages that a search engine bot has crawled on the site. These two metrics reflect a website＇s visibility and health within search engines. The relationship between the number of Indexed URLs and Crawled URLs can help webmasters understand how a search engine is indexing their site. An Indexed URL count significantly lower than the Crawled URL count might indicate content quality issues on the site, while a very low Crawled URL count could suggest crawl barriers preventing the bot from accessing pages.