A "do follow" backlink is a hyperlink from one website to another that is recognized by search engines as a vote of confidence for the linked website. In other words, if a website links to another website using a "do follow" backlink, it is essentially telling search engines that the linked website is valuable and trustworthy.

The opposite of a "do follow" backlink is a "no follow" backlink, which tells search engines not to give any credit to the linked website. This is often done to prevent spam and discourage the manipulation of search engine rankings.

While "do follow" backlinks can be helpful for improving a website's search engine rankings, it's important to remember that quality is more important than quantity. A few high-quality "do follow" backlinks from authoritative websites are often more valuable than many low-quality backlinks from irrelevant or spammy websites.

It's also important to note that attempting to manipulate search engine rankings by buying or exchanging "do follow" backlinks can result in penalties from search engines, so it's important to focus on creating high-quality content and building natural backlinks over time.