Tumblr has become one of the most popular microblogging sites. It is a good platform for bloggers or people who like reading blogs.
Posting on tumblr is super easy. You can either blog or reblog the blogs or posts you like and wish to share. There are other features as well, like uploading photos and videos. My favourite, however, is uploading gifs and checking the ones uploaded by other users.
There are several communities as well, where you can check feeds, etc. Good for networking as well, you can just post a photo with proper tags and you might get noticed by the relevant communities. I often bookmark or reblog the posts. A great site for discovering, exploring or sharing experiences and even to establish contacts or networks.