Search Console
A Search Console is the free tool a search engine gives to site owners. It shows which queries your pages appeared for, how often they were clicked, and which pages could not be indexed.
Google and Bing each run their own. Both show queries, impressions and clicks per page — but the two sets of numbers must not be added together or compared directly, because the time frames and the way they are collected differ.
Getting started requires something from you: ownership of the domain has to be proven once, via a DNS record or a meta tag. After that it runs by itself, though with a few days of lag — today's numbers are not there today.
Two limits matter. Rare queries are left out for privacy reasons, so per-page figures are lower bounds. And Bing gives no positions over time, only snapshot values.