Everyone probably knows about Google's image search. However, not everyone knows yet that the American giant now provides links to buy items from images found or similar to them.The company is using machine vision technology to search for items in images and to find similar items. Nevertheless, web developers still need to add metadata to their sites so that potential buyers can link to them from an image in a Google search. According to Search Engine Land, the search giant has been accepting the relevant data since December of last year. At the moment, you can try out the new feature with the mobile version of the search, or in the appropriate application for Android. While the innovation is only being tested, but by the end of this year Google plans to launch it on other platforms.