It can be helpful feedback to recognize that you’ve seen something your teammate sends over. In Asana, you can easily recognize a task, comment, or conversation by liking it. With one click, you can inform your teammate that you have seen and acknowledged their communication. Try it out today 
3 Likes
What I like about likes, even more than acknowledging a comment, is that it works as a bookmark of sorts. I can use it to easily find a task in a list or even sort a project by likes. I love that.