What is a stream?


A user asked us if we there was a stream for a lecture we had/hashtagged

I know for some hashtags, i can just do a google search and then I get all the updates for that stream?

How can I make a stream- so someone who was not at the event could follow. I thought you could only follow via hashtag, but I didn’t realize there might be some other method. Please guide me!

Thanks twitter.