On Twitter, Google’s John Mueller said that bad links should be obvious to experienced SEO’s. You only have to disavow links if it is obvious that the links are harmful:
If it's not obvious to someone like you, then those links are probably neither helping nor harming, so it wouldn't matter if you had them disavowed or not. It's easy to focus too much on links – if you're worried, then disavow, otherwise spend more time making the site fantastic!— 🍌 John 🍌 (@JohnMu) May 1, 2019
Which links should you disavow?
You only have to disavow links if you actively built spam links in the past. It’s normal that the quality of the links that point to a website varies. Google know that and these low quality links don’t influence the rankings of your website.
If harmful links aren’t obvious to you, you can use the Link Dinsinfection tool in SEOprofiler. The Link Disinfection tool shows you the bad links that point to your website. It also creates a file for Google’s disavow links tool for you.
How to make your site fantastic
SEOprofiler offers several tools that help you to make your website fantastic. Remove errors with the website audit tool, optimize the content of your pages with the Top 10 Optimizer too, add rich-results markup code, find the best keywords, and much more.