Checking Android Certificates

I recently purchased a Galaxy A51.
I noticed certificates that were located in the Credntial Storage in User Certificates.
Are these supposed to be there?
I have owned many android devices and none of them had these certificates in that location.
Can I remove these safely do I need them?
How can I check certificate to see if they are safe.
Including the ones located in the Security certificate.
User | System
And what is the difference between the Work and Personal
Certificate sections..
There is many certificates I do not recognize and would like to check them.
I have been having unusual security issue with this phone.
Also where can I get official SSL Certs for this device.