If you’re new to Twitter, you’ve learned to reply, direct message, retweet, and you’ve finally reached a stage where you don’t know why people are adding hashtags (#) or pound symbol at the end of their posts, like #followfriday # Ladygaga, you don’t know what this is hashtag meaning or.
Twitter didn’t provide users with any way to group tweets, people created their own hashtags to categorize their tweets. Anyone can create a hashtag for a relevant topic, but not for spamming purposes.
People add hashtags at the end of tweets, most of these hashtags are indexed by Twitter and show them as trending topics. Whenever you search for a specific hashtag, your hashed tweet can show up in Twitter search results. We can call trends like breaking news appears on the twitter homepage.
hashtag.org shows popular hashtags used on Twitter.
If you want to know about a specific hashtag visit what is the hashtag, type that hashtag in the search box and this service shows hashtag definitionsfeatures and usage statistics and related hashtags as well.
For example, I searched for the hashtag #fb, see the information provided by this site in the screenshot for this hashtag.
tagal.us website type similar to wthashtag.com briefly shows the tag definition.