What are the advantages of a TLS certificate over SSL? And what are the challenges you might face?

Question

Data protection

I am also interested in where it is better to buy a TLS certificate for a site.

Answer 1

SSL and TLS are not names of certificates, but protocols.
In essence, TLS is an evolution of the SSL version 3.0 protocol.
In simple terms, TLS is more secure than SSL.
The certificate for SSL and TLS is the same. Buy as usual. If you already have a certificate that you refer to as an "SSL certificate", then use the existing one.
The only thing you need to do is to correctly configure the web server so that it supports the TSL protocol and does not support SSL.