How do you reply to somebody's post on TwitteR?

[Mrs. Bieber♥ only you shawty ツ]

So, I just got a Twitter, and I'm really confused. I know how to write what you are doing, but say somebody tweets saying:

"Whats your fave mall?"

How would you reply to that?

and what does it mean if somebody puts @____

Thanks so much!

[luk b]

Hi,
You can view the free Twitter Videos and learn from there.
Then get lots of ideas and fun using Twitter.
John.

[→♥pAoLa♥←]

idk.... sorry.....