In the Charts section of the analysis tool you can view, edit and download a chart that lists each map question and how many responses they got.
You will see the same numbers in Map responses next to each question.
If you apply a filter to the question, the number will change to show the number of responses that fit that condition out of the full number of responses.
In Explore, you can zoom in on clusters of responses and see how many responses where placed in that area (Map Responses). For example, in this example below there are a total of 36 map pins in the area shown
The tab next to it (Respondents) shows how many individual respondents made these responses we see on the map. This way you can easily check if they were left by multiple respondents or just one 'spammer', and find if there are similarities between pop-up question answers.