What is "Total - Display Select" and why is it the number 4? How is that number 4 calculated? If you sum up all the cells above it in that column, it doesn't give you the number 4. I was expecting the number 1 because I only see 1 click in the first row, which is properly summed up in the row "Total - all but removed keywords". So I don't know what "Total - Display Select" is trying to report on.
"Display Select" refers to clicks from ads showing up off of Google search and not associated with a keyword. They show up on Google partner websites that have a topic that closely matches the keywords. Here is an article that explains the feature: https://3qdigital.com/3q-accelerate/4-things-need-know-display-select
This feature appears to be similar to the "content network" option that lets ads show up on AdSense websites.