A hashtag is when the # symbol is used to mark keywords or topics in a Tweet. It’s like a tag or category in a blog and is a way to organize or categorize tweets. But you don’t just hashtag anything.
Kent Shaffer as a a great read over at Church Relevance where he lists some of the top ministry related hashtags. Some of those hashtags are:
Check it out. You can see all the hashtags at his post:
What hashtags do you use most?