More than two years ago, I wrote this:<p>[…]<p>What do I mean with “the threat of Facebook”? In the old days, before today’s large “social media” sites, people made their own web pages on places like GeoCities or on simpler social-media-like sites like LiveJournal, etc. Those sites all had content and linked to each other. <i>This</i> is the web which the Google search engine and its algorithm was meant to find things in, and it worked very nicely, as it took advantage of the links other people had made to your site as a proxy for relevance in search results for your site. People making small web pages about their favorite topics (with lots of links to other people’s pages, since information was hard to find) could slowly and easily transition into making larger and larger reference web sites with lots of information, thereby attracting lots of incoming links from others, which in turn enabled people to find the information using Google’s search engine.<p>Compare this to now. Firstly, people having a Facebook account have no place to simply place information, no <i>incentive</i> to simply make a web page about, say, tacos or model trains, because that’s not what Facebook is about. Facebook is about the here-and-now, and whatever is yesterday is forgotten. As I understand it, there is no real way, in Facebook, to make a continuously updated page with a fixed address for people to go to as a reference point about some subject, or at least people are not directed towards doing this as part of their online activity (as opposed to in the past, when it was basically the <i>only</i> thing which people could do). Secondly, this makes it so that people have no natural path going from using Facebook to creating a larger web site with information, and there are no smaller model train or taco Facebook “pages” which could have links to your larger site and thereby validate its relevance. Thirdly, even if this second point was false, Google could not use these Facebook pages, because Google cannot crawl them. These pages are all internal to Facebook, and Facebook has every incentive to not allow Google to crawl and search this information. Facebook would much rather people used their own site to search, and thereby gaining all of Google’s sources of income: User monitoring and advertising.<p>— <a href="https://news.ycombinator.com/item?id=13295456" rel="nofollow">https://news.ycombinator.com/item?id=13295456</a>