1. The model also takes into account the decline of hashtags when an event is over.

2. Facebook introduced hashtags this year but they have not been popular.

3. We want people to be able to express themselves, and hashtags are a great way to do that.

4. You can even add images to each tweet, add hashtags and quickly find and mention any user.

5. It looked at everything from hashtags used to advertise money flipping to image recognition.

6. For certain things in life, hashtags make sense.