MyBB Community Forums

i am new to mybb forum,so how it can be to seo it?
the topic urls and category urls are not seo friendly.
which plugins or codes do seo it?
mybb set category and thread urls like:
forum-1.html
thread-1.html
but how to change urls to name of topic or category ?
thanks for reply.

You want the Google SEO plugin which you'll need to search the Extend section for.