#hashtags
Ivars Krutainis and Mandi Bateson
Background
Although hashtags are still mostly associated with Twitter, their use has become a lot more widespread, especially with natural hashtag integration in such sites and mobile apps as Tumblr, Instagram and Pinterest. It is widely accepted that (Twitter) hashtag was invented by Chris Messina on August 23, 2007 (not a Twitter employee) a year after Twitter was established.
Details
Hashtag is a tag embedded in a message posted in social media, consisting of a word within the message prefixed with a hash sign (e.g. a joke followed by #lol or description of a...