Yes, that is true. Facebook Like Button is a powerful thing. Firstly, if you are interested in something like news, albums, some sort of other information, you can just click on the Like Button and you will be connected to the post or the page you have liked. Secondly, when you like someone’s page, the result of it will immediately appear on your Facebook wall. So, in such a way you are always stay connected to your friends or information you liked.
Hi, The Like button lets a user share your content with friends on Facebook. When the user clicks the Like button on your site, a story appears in the user's friends' News Feed with a link back to your website.
Bottom "like" is a good way to express your attitude to different actions. For me it is very pleasant to receive likes from my friend even without comments)