Dofollow and Nofollow are attributes that can be added to hyperlinks to influence search engine crawling and indexing behavior. A "dofollow" link is a standard hyperlink that allows search engines to follow it and pass on link equity (or "link juice") to the linked webpage, potentially improving its ranking in search engine results. In contrast, a "nofollow" link instructs search engines not to follow the link or pass on link equity, often used for untrusted content or to prevent endorsement of the linked page. Understanding and strategically using these attributes can significantly impact SEO and site authority.