Clicks and Impressions
Looking at the reports generated by Google Search Console (GSC) I see that many of my pages are registering "impressions".
The GSL help pages explain Impressions, etc, in more detail.
At first I thought that Impressions were not very useful and only showed that a user had clicked-through your page. In fact they are very useful and show that a users search resulted in Google displaying it (potetially, as it could be well down the SERP) and that your page actually contained information that the user was looking for. Judging by what I see of most users they don't really understand what they are seeing in a SERP (Search Engine Results Page), so an impression is a good indication that the page should be exanded or improved and eventually result in a "click".
What is search result position?
Again, the GSC help explains --- I have not included the diagram (you can visit the Google site using the link below)
The page analysed in the GSC explanation contains a carousel - which is part of the AMP Framework.