How to optimize your product page for search engines?

Question

Search Engine Optimization

Is it properly organised? If not, what is the best way?
There is a product page that includes a description and two tabs - reviews and questions. Reviews are opened when the url contains the ?act=review parameter and by default, and questions
?act=question.
Reviews and questions are divided into pages. When you click on pagination, the content is loaded by Ajax. And when you directly click on the link, for example: ?act=review&page=2, the product page loads completely without Ajax and includes the 2nd page of reviews. The same goes for uploading questions.
The question arises how to optimize all this for proper indexing by search engines, so that there are no duplicates and other problems. Decided to do it like this:

Answer 1

Like, right.
I would also add JSON-LD markup.