I need a suggestions

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention

Personally, I would recommend a separate domain for your IMDB-like site if you’re creating exceptional content and creates a lot of backlinks as they can be valuable in providing links back to your main site.

However, there are pros and cons in choosing a subdomain or a new domain name like authority, content quality, etc:
https://rankmath.com/kb/does-installing-rank-math-guarantee-rankings/

You can also check these helpful links for choosing a subdomain/subdirectory or a new domain and strategize for different approaches to SEO:
https://www.smartinsights.com/search-engine-optimisation-seo/internal-linking-strategy/which-is-best-for-blog-seo-subdomain-or-subfolder/
https://www.searchenginejournal.com/subdomains-vs-subfolders-seo/239795/#close

I hope that helps.

Thank you.

Hello,

We are super happy that we could address your concern.

If you have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.

Thank you.