I have had Facebook for about seven years now and to say that Facebook has remained static with no change during those seven years would be one of the biggest understatements of the young 2017. Whether it be the addition of the "cover photo" or the new messaging app or being able to "love" or "haha" an image or post, Facebook is constantly changing. The newest change Mark Zuckerberg and company brought us has to do with the Facebook search.
Facebook now allows its 100+ billion people search for any photo on Facebook using any keyword. For example, you could type "hamburger" and it will show you pictures posted on Facebook of hamburgers. You could search "baseball field" and there will be pictures of baseball fields. However, it does get more broad than that. You could search "creepy" and get many different kinds of photos. You can even search "food photos", however, searching "photos of me with food," there might not be many relevant results. This photo search update is available to both mobile and web users.
In my opinion, this is a very cool new feature Facebook has rolled out. It will be kind of similar to "Google Images", however, this will be more social based. That means that these photos will just be uploaded by random Facebook users, as opposed to Google Images which takes the photos from the entire web. Maybe it will make Facebook more popular than it already is. It adds to the already multitude of different things you can do on the most popular social networking site ever.
Source : http://www.theverge.com/2017/2/2/14486034/facebook-ai-update-photo-search-by-keyword