How to change the content of the site depending on the gender and age of the visitor?

Question

Search engines

There is an idea to issue individual text on the site for each age group and gender. Is there technology to do this? Of course, the user himself does not have to specify anything.
How do Metrics and Google Analytics counters determine these parameters?

Answer 1

counters are taken from Yandex and Google
and ask the visitor what the word kodak means

Answer 2

If the user doesn't specify anything, you won't be able to determine anything.
There are no such technologies.
All counters and analytics use the data that the user has previously specified.

Answer 3

You make an advertising campaign on the network, where they give you the opportunity to show ads only to a certain category of
people

Answer 4

Hey!

Of course, the user himself does not have to specify anything.

No way.

There is an idea to issue individual text on the site for each age group and gender. Is there technology to do this?

For example, on pornHUB, this is generally coolly implemented. He asks for your VK profile and receives your age from there. You can follow in those footsteps. That is, if a person is under 18, then show certain content, if there is 18, show all the delights of adult life.
You can make a preloader and make a form before it starts, like a test.
Or, in general, both.
But there is no 100% way