Is autocomplete a paid feature?

Hi there,
I’m a bit confused about the autocomplete feature. In the Pricing page, it says that the free plan includes 2.000 completions. However, in some other threads I noticed that Cursor Tab needs to be enabled in order to get them, but it seems that that’s a paid feature. So, does “completions” mean that Cursor would suggest code as I write it? If so, how come it is not suggesting me anything? Or “completions” is a totally different thing, and what I’m after is Cursor Tab, which is paid?