Total newbie here — how do you actually leave a review on a product you've used?

Hi everyone. I literally just made an account today, so please excuse the dumb question. I've been browsing Product Hunt for ages without one and finally signed up.

Here's the thing. I've been using a couple of tools I originally found here for months now and I wanted to give them a proper review, since that's how I found them in the first place and it felt like the right thing to do. But when I open a product page I can't figure out where the review option actually is. Is there a specific place you have to click, or do you need to have upvoted it, or is it tied to launch day only?

I feel like I'm missing something obvious. Maybe it's just because my account is brand new.

Also, while I'm here — when you do leave a review, what do you actually write? Just whether you liked it, or do you go into detail about how you use it? I don't want to write something useless, but I also don't want to ramble on about a tool nobody asked about.

Any guidance appreciated. Still figuring this place out.