Type # in front of a keyword you wish to track and $ in front of a ticker symbol you wish to track (Figure 1):
Figure 1 Hashtags And Cashtags
When you click on a tag, you will see a chronological list of all messages that include that particular tag (Figure 2):
Figure 2 Tag Data
Note: Be sure to use tags consistently so you can keep relevant information in a single feed. You can also create signals to aggregate and track relevant tags