It might seem obvious: you do not have a good website just because it doesn’t have a manual penalty. Google’s John Mueller confirmed this on Twitter. A webmaster thought that the link profile of his website was good because Google did not penalize his site.
Hi @JohnMu I have no Manual Action. That means I can think my sites link profile is enough ok. What would you think?— Md Shahinuzzaman (@shahinAnSEO) December 6, 2019
Of course, this is not true. Just because Google does not think that your website is spam does not mean that the website is good:
Not all sites are manually reviewed by the webspam team, and manual actions cover a variety of topics, so not having a manual action doesn't mean that the website is good overall.— ? John ? (@JohnMu) December 6, 2019