Google’s John Mueller said on Twitter that you only have to use Google’s disavow links tool if you actively built spammy links. He answered the question of a webmaster who asked whether he should disavow some low quality links that pointed to his website.
Unless you actively built spammy links, the answer is usually no.— 🍌 John 🍌 (@JohnMu) October 17, 2019
How to find bad links that point to your site
As said above, you only have to disavow links if you actively built spam links. The Link Disinfection tool in SEOprofiler helps you to find bad links that point to your site: