The purpose of a stream might not be obvious just from the title. Clearly convey what the stream is about by describing the purpose within the stream.
Steps
Add a Stream Purpose for the first time
Visit the Stream that you would like to have a description. If there hasn't been a purpose added yet, you will see the Add description in the header. Click on Add a purpose
This will open up a modal. Type in the stream purpose then press Save & Close.
You will then see the stream purpose beside the Stream header.
Edit an Existing Description
If you the stream already has a description and you would like to edit it, you can do so by clicking on Stream Settings β‘οΈ in the upper right hand corner, or by clicking the stream purpose itself.
Then click on Stream details and click on the pencil icon (π) next to the description to make any edits.
Press save & close, and there you have it!