The History of PageRank

PageRank's story runs almost exactly parallel to Google's own. It began as a graduate research project, became the engine of the world's dominant search company, spent a decade as an obsession for webmasters, and then quietly disappeared from public view. Here is how it unfolded.

1996: A research project called BackRub

At Stanford University in 1996, two PhD students, Larry Page and Sergey Brin, began studying the link structure of the web. Their project was nicknamed "BackRub" for its focus on back-links — the incoming links pointing at a page. They reasoned that these links contained a huge amount of untapped information about which pages people actually valued.

1998: The paper that launched a company

In 1998, Page and Brin published The Anatomy of a Large-Scale Hypertextual Web Search Engine, describing a prototype search engine named Google that used PageRank to order results. The results were noticeably better than the keyword-counting engines of the day. That same year Google was incorporated. Stanford held the PageRank patent and licensed it to the company — a deal that would eventually earn the university a fortune in Google shares.

2000: The Toolbar and the green bar

For its first couple of years, PageRank was invisible — a number crunched inside Google's data centers. That changed in December 2000, when Google released the Google Toolbar for web browsers. Among its features was a small horizontal gauge that displayed a page's PageRank as a green bar, scored 0 to 10. Suddenly every site owner could see a Google-blessed number for any page on the web, and an entire cottage industry of PageRank checkers, badges, and forums — this site among them — grew up around it.

2000s: The obsession years

Throughout the 2000s, Toolbar PageRank became a currency. People bought and sold links based on the PageRank of the linking page. Directories charged more for a listing on a high-PR page. "PageRank sculpting" — carefully arranging internal links and the nofollow attribute to funnel authority to key pages — became a popular tactic. Google grew increasingly uncomfortable with how much the visible score encouraged link schemes.

2013: The last update

Over time Google refreshed the public Toolbar number less and less often. The very last update landed on December 6, 2013. After that, the green bar simply froze. Any "PageRank" you saw from then on was a snapshot of that final 2013 reading, growing more stale by the day even as sites changed completely.

2016: The public metric goes dark

In March 2016, Google confirmed it was removing Toolbar PageRank entirely, and within weeks the underlying data feed that third-party checkers relied on went dark for good. Modern browsers had already dropped the old toolbar, so for most people the number had quietly vanished years earlier. With that, the public era of PageRank ended after roughly sixteen years.

The green bar's cultural footprint

It is hard to overstate how much that little gauge shaped the early SEO industry. Entire businesses were valued on the PageRank of their homepage. Bloggers celebrated "going PR5" the way others celebrate a milestone. Link brokers published price lists keyed to PageRank, directories advertised the PR of their category pages, and forums filled with theories about the timing of the next "PageRank update." When the number finally vanished, a whole vocabulary and a small economy went with it — a reminder of how powerfully a single visible metric can steer an industry's behaviour, for better and for worse.

After the bar: still working behind the scenes

Retiring the public score did not mean abandoning the idea. Google representatives have stated that link analysis in the spirit of PageRank remains part of the company's internal ranking systems. What changed is that the number is no longer handed out for the public to chase and trade. If you want to understand how authority is gauged now that the green bar is gone, read what replaced PageRank, or see the practical side in how to check a website's authority.