What is the meaning of autocomplete sites?

Question

Computer networks

Hello.
On telderi I came across sites with auto-completion, the price for such sites is not high.
In sense of such sites for buyers?

Answer 1

These are the so-called GS. Autocompletion is based on slow search engines like Yandex, which can consider it as the original.

Answer 2

I also stumble upon this. Meaning - well, viruses to distribute platform-oriented, redirects ...