The clicker is used in the clicker-training method. The sound tells the dog the moment she did the correct thing.
So in this example, the dog barks continuously. You say "quiet" and the dog stops for even a second, you click the silence and give the dog a reward.
You could also use your voice and a reward. Say she's quiet when you give the command, say "good girl!" or "Yes!" and give a reward. That can work just as well. Clickers have some advantages voice praise doesn't, but your voice is something your dog probably already associates with good things, especially when in a upbeat tone, which eliminates the first step in beginning using a clicker, pairing it to equal a soon-to-come reward.
Also, she may just be excited or something could look or smell interesting and she might want you to look at it or take her there for a closer look/sniff.
Since she's not scared or nervous when she barks, sounds like it's a possibility. I admit, extroverted dogs aren't something I'm familiar with
So in this example, the dog barks continuously. You say "quiet" and the dog stops for even a second, you click the silence and give the dog a reward.
You could also use your voice and a reward. Say she's quiet when you give the command, say "good girl!" or "Yes!" and give a reward. That can work just as well. Clickers have some advantages voice praise doesn't, but your voice is something your dog probably already associates with good things, especially when in a upbeat tone, which eliminates the first step in beginning using a clicker, pairing it to equal a soon-to-come reward.
Also, she may just be excited or something could look or smell interesting and she might want you to look at it or take her there for a closer look/sniff.
Since she's not scared or nervous when she barks, sounds like it's a possibility. I admit, extroverted dogs aren't something I'm familiar with 
