A hashtag is made by putting a '#' symbol in front of a word without spaces. Hash tags are an easy way to search for common areas of interest on Twitter. Recently, it has been written that 10% of Twitter does not know how hashtags work.
A hashtag term may be put in the search box to find recent tweets containing the hashtag text.
Once you hit the magnifying glass symbol, ( 0--- ) a listing of recent tweets is shown.
When groups of people use a common hashtag a hashtag subject or team forms. Certain team hash tags can be seen when users post messages with multiple hashtags.
I did a hashtag sampling to determine which team hashtags were the most popular, and as you can see, there is a big difference shown in the sampling.
1, 737 #mustfollow
As shown, there is an big amount of difference in the amount of hashtag usage. A highly used hashtag leads to a potential audience with a greater number of exposures.