What does the hash tag (#) mean on Twitter?
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Frequently Asked Questions » Twitter Basics
Q. What does the hash tag (#) mean on Twitter?

A. The hash tag (#), is used on Twitter for users to categorize their tweets.  By using hash tags that place your tweet into an appropriate category, it would be easier to find by users who know how to search for hash tags.


Ok, let's break this down a bit... First of all, hash tags can be made up by users -- it is really an "unofficial" categorization method developed by the community.  So for example, if your post is about cars, you can include the has tag "#cars".  This is an obvious hash tag, as most are.  However, some are less obvious.  For example, at the New York Auto Show, the hash tag used was "#NYIAS" (or "#nyias" - case insensitive).  This tag was most likely created by the people behind the autoshow.  Now, if you wanted to know what was going on at the autoshow, you can search for "#nyias" at search.twitter.com and see all the related posts, assuming users who tweeted about it used the tag.

The hash tag system is an imperfect system and used by a very small percentage of the Twitter community, but very useful in some cases.

(BTW - yes, we will be at #TWTRCON - http://www.twtrcon.com on May 31, 2009. Come see us!)

:created by Bo and last updated by Bo on 2009-04-27 05:49:20 - viewed 250536 times

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a guest said on Monday, December 14th 2009 @ 9:47 AM:

thanks relay helpful

a guest said on Tuesday, January 18th 2011 @ 2:53 AM:

helpful thankyou

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a guest said on Thursday, April 7th 2011 @ 2:12 PM:

Thanks so much for this post, I have been "tweeting" for a month or so with good success but, could not figure out the has tag - now I do and think it will help me between business and personal tweeting. I will be visiting regularly for more great tips!

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a guest said on Friday, May 13th 2011 @ 3:46 PM:

I love knowing what the # means, now if I only knew what #ff means..... a category for fast freelancers? Or fake faeries or follow fools? Hmmm, maybe I should stop while we are all ahead!

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a guest said on Sunday, September 18th 2011 @ 6:44 AM:

Thankyou. That had been confusing the heck out of me. #goodtoknow

a guest said on Friday, September 23rd 2011 @ 4:21 PM:

i hear it all the time - it expains it perfet - thx - a sorting tool - got it

a guest said on Monday, September 26th 2011 @ 1:31 AM:


a guest said on Sunday, November 20th 2011 @ 5:55 AM:

Thanks! This really helped.

a guest said on Wednesday, December 7th 2011 @ 3:53 PM:

#helpful info

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a guest said on Thursday, December 22nd 2011 @ 9:09 AM:

I wanted to know what the # sign mean, so I googled it. Thanks for the info.

a guest said on Friday, January 6th 2012 @ 11:43 AM:

Thanks for this! I was wondering what benefit it provides to have the # tags. What exactly does the @ do though?

a guest said on Monday, July 16th 2012 @ 8:17 PM:

@bryan The @ is to reply to someone, like I did just now!

a guest said on Monday, August 13th 2012 @ 7:24 AM:

Thanks, I've been wondering!

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a guest said on Wednesday, September 26th 2012 @ 2:00 AM:

Hashmarks can also allow your tweets to automatically post to a particular group or a community website, be used to enter you into contests and serve other related functions.

a guest said on Thursday, October 25th 2012 @ 11:29 AM:

Really helpful thanks x

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a guest said on Tuesday, March 5th 2013 @ 11:45 AM:

Great information. Thank you!

a guest said on Saturday, March 9th 2013 @ 1:25 AM:

#ff stands for follow friday

a guest said on Friday, April 12th 2013 @ 4:12 AM:

Still don't get it?!

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I still have no idea

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#This the number sign or pound sign . forget all your stupid hash tag crap

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