Using Google Search Console you can see the search phrases or queries that your site is ranking for. Sorting through this data will help you get ideas about which pages are doing well and which pages need a bit of optimization to help rank them higher.
This video gives you an overview of how to use the Search Console analytics data and to look for patterns within that data so that you can make decisions about how to best improve a page, whether that be onpage optimization changes or getting more backlinks for example.
If you have any questions please leave a comment below. Google often changes things so if what you see in your Console does not match up with the video, let me know so I can make a comment to help guide people who are watching.