This method of avoidance, however, also has various drawbacks, such as reducing the link value of legitimate comments. (See: Spam in blogs#nofollow)  In an effort to manually control the flow of PageRank among pages within a website, many webmasters practice what is known as PageRank Sculpting—which is the act of strategically placing the nofollow attribute on certain internal links of a website in order to funnel PageRank towards those pages the webmaster deemed most important. This tactic has been used since the inception of the nofollow attribute, but may no longer be effective since Google announced that blocking PageRank transfer with nofollow does not redirect that PageRank to other links. Google now using UGC rel attribute of HTML that stands for User Generated Content, and the ugc attribute value is recommended for links within user generated content, such as comments and forum posts. "[Citation needed.]" PageRank was once available for the verified site maintainers through the Google Webmaster Tools interface. However, on October 15, 2009, a Google employee confirmed that the company had removed PageRank from its "Webmaster Tools" section, saying that "We've been telling people for a long time that they shouldn't focus on PageRank so much. Many site owners seem to think it's the most important metric for them to track, which is simply not true." In addition, The PageRank indicator is not available in Google's own Chrome browser. The visible page rank is updated very infrequently. It was last updated in November 2013. In October 2014 Matt Cutts announced that another visible pagerank update would not be coming. Even though "Toolbar" PageRank is less important for SEO purposes, the existence of back-links from more popular websites continues to push a webpage higher up in search rankings. Google elaborated on the reasons for PageRank deprecation at Q&A #March and announced Links and Content as the Top Ranking Factors, RankBrain was announced as the #3 Ranking Factor in October 2015 so the Top 3 Factors are now confirmed officially by Google. On April 15, 2016 Google has officially turned off display of PageRank Data in Google Toolbar. Google had declared their intention to remove the PageRank score from the Google toolbar several months earlier. Google will still be using PageRank score when determining how to rank content in search results.