How can you find out what site visitors were looking for through site search?

Question

Electronic commerce

It is required to get all requests that users entered through search on the website of the online store (openCart 2.1). There is a possibility?

Answer 1

Responsible for the search:
catalog/controller/product/search.php
Record wherever you want

Answer 2

in Google Analytics set up, it will be in the "search on the site" section