An adverb meaning 'that much' or '(not) particularly'; often used with negative verbs to mean 'not very' or 'not so'.
この問題はさほど難しくないから心配しないでください。
This problem isn't that difficult, so don't worry.
彼のことはさほど詳しく知らない。
I don't know much about him.
さほど時間はかからないでしょう。
It probably won't take that much time.