Joining its social competition Facebook and Twitter, Tumblr announced today it has added an @mention functionality.
Users can enter the @ symbol and then someone’s username inside their post. A drop down menu will appear with a list of users closest to your search.
By typing the “@” symbol and then the username of who you want to address inside a Tumblr post, a drop down menu will appear. The user you are mentioning will get a notification on their dashboard and on their activity page.