I researched on the BBpress forum and also on google, I found that by using
[bbp-topic-tags] shortquote, I can show visitors of my site the tags which are used in all the forums.
But the tags appear all next to each other. Is there any way to display tag with the number of topics besides them. Also, the tags are just shown in a single line. It would be better to have a show in an unordered list. And then sorted according to the number of times topics they have been tagged to.