What countries do you think are the best for studying?

Sincere question: what is the point of prestige? In the states there's the Ivy League schools (Yale, Harvard, Princton, etc), there are extremely particular on admissions, but the quality of the education isn't necessarily much better than equivalent private universities. Their branding is just so significant because almost every president or powerful person has been there.

If you're looking for practical reasons, (at least in the US) focus on the area the school is located in as the number one priority. You will get a quality education at 90% of universities you attend as long as you put the work in. Your decision should be instead whether you want to deal with Seattle's never ending rain, Nashville's music related tourism, or Miami's Cuban influence. The question isn't "what's best" as opposed to "what do they have that I want". The school will tell you the majors and programs it has on their website.
Prestige matters
The more name brand credibility
The more of a head start you usually get
First of all is peers the people sitting next to you in prestigious universities like harvard , yale etc are future successors they're also ur future connections
Those schools also give u more resources to work with and it gives a Big headstart in landing a high paying job and top companies usually hire from there
It's also a nice look for ur resume having Harvard or Stanford on your resume is a proof of hard work