whathashtag is a hashtag research tool to find the most relevant hashtags to be integrated in Twitter posts. By submitting a term the tool finds synonyms and indicates the most popular keywords used as hashtags. Finding the most appropriate and popular hashtags means to get an optimized distribution of news and to reach target groups.
The Hashtags (written like #term) are important by being used on Twitter itself and being reachable by the numerous Twitter apps as well as by general social search engines accessing content posted on Twitter. Furthermore the big search engines are accessing content from the social web, which makes hashtags a general mean to search engine marketing and optimization. Hashtags may be found by direct search queries and do list relevant posts by being clicked.
Directory Sources: Social Media Marketing