#hashtag actually how to use

The # (hashtag) is a way to categorize in a way. On Twitter if you #hashtag something you can later look up that # and see everyone who is posting about it.

For instance: today is National Coffee Day so you can search twitter for #NationalCoffeeDay and you will probably find people posting they got a free coffee at this place, or are enjoying a coffee on NCD, etc.

Or if you are looking for info on your city you could look up #(cityname)

Also, it is just a way for people to be obnoxious because they make full sentence hashtags
#idontknowwhatiamdoingwhenitcomestohashtags

it is not unfamiliar to see some long string of words following a hashtag... basically just a thought that people want to share...

Twitter: Twitter is the birthplace of modern hashtag usage — as such, its hashtags are more versatile than other sites'. Twitter hashtags are mainly used to denote specific topics of conversation

FB: Facebook only recently added hashtag support in June 2013, and the practice has not picked up much steam. Nevertheless, clicking on Facebook hashtags will take you to a list of posts containing the same hashtag. The results are not limited to people you know.

Instagram: Hashtags can be used to complement photos shared on Instagram and help you discover new accounts and pick up followers. Some hashtags were created specifically for Instagram photo challenges — #ThrowbackThursday, for example, encourages users to post retro photos.

Vine uses hashtags in the same way — try accompanying each of your Vine videos with at least one hashtag to maximize share ability.

Google+: When you click on a hashtag in Google+, the search results will include the original hashtag as well as posts with similar tags and keywords. Google search results display on the left side of the page, while hashtag results from within Google+ appear on the right. Google also gives you the option to search within Facebook or Twitter.


Tumblr: Tumblr posts have a special “Tag” section where you can enter tags. These tags function like Twitter hashtags, organizing posts by topic, but the hash symbol is inserted automatically. Hashtags included in the main body of a post are not transformed into links.


Pinterest: Use Pinterest hashtags to mark and search for content. Click on the hashtag in a pin description to navigate results that contain the exact hashtag, plus pins with the same word or phrase in the description.
Hope this helps!