Hashtags are an easy way to at least double the effectiveness of your tweets. Here are my notes on hashtags and a tool that can help with hashtag marketing:
- Using a hashtag allows people who don’t follow you to discover your tweets
- Use relevant hashtags or you’ll be flagged as a spammer
- Focus on hashtags that lots of people search for but fewer people use
- Avoid hashtags that are too popular or not popular enough by looking for a Hashtagify score of 25 to 30
Source: http://hashtagify.me/