Links are votes from other websites. Each of these votes tells search engines: “This content is valuable, credible, and useful”.
So the more of these “votes” you have, the higher your site will rank in Google and other search engines.
Even though Google has made thousands of changes to its algorithm since then, backlinks remain a key ranking signal.
For example, an industry study that we conducted found that links remain Google’s key ranking signal.
And Google has confirmed that backlinks remain one of their three most important search engine ranking factors.