This is a question to the SEO experts :-) I apologize for my bad way to write English :-(
I am developing a web application (with a kind of custom CMS). In my app there will be a "user section", each user will have his/her "page" liek domain.com/user/john/
It turns out that these pages will have a lot of informative content (necesary) in general, but they will change on some basic things (user data) such as name, last name, phone numbers, address, email, avatar, country and some other variables that are repeated throughout the web.
But ... between a website of one user and another, if we want to be strict, more than 80% of the content will be totally the same - Is it a problem if I leave
I do not think it's convenient to use
re-canonical pointing to the "mother" web that will contain that 80% of information and something else - Why? Because in my opinion,
rel-canonica is for IDENTICAL webpages in different URI routes but with identical content - which is not the case, although there is much content equal, but not absolutely.
The content of the user page is very huge, I think it can be like 20 letter pages.
I want know what will be the optimal layout in this situation. I will have many users in the system. I'm afraid that a user page get a beter position than another or beter than the "mother page", or even worst, get the entire domain black-listed or something.
Thanks for reading!