The social media giant has started testing a “want” button, which allows users to flag retail items they’d like to purchase. Here’s a look at other Facebook features released throughout the years.

In many ways, Facebook is like each one of its billion members: constantly growing, changing, trying to better itself. What that’s meant for the social network over the years has been a relentless evolution of its key features, and Facebook is at it again. In a bid to ramp up its e-commerce efforts, Facebook has begun testing a “want” button, which allows users on the site to flag retail items they’d like to purchase.

Time will tell if the “want” button has lasting power on Facebook, but several of the social network’s features came from humble beginnings just like this. And, sometimes, they’re not without controversy. From the News Feed to Marketplace, here’s a look at Facebook’s features through the years.

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