what do you mean when you exclude article by automation tool ? give me example of automation tool you used?

Assignment Question

In the defense video about my term paper they asked me why you choose these article ? is it mixed article with report ?

Your key words in the PubMed and there is 2000 researches what is your strategy of choosing researches ? what do you mean when you exclude article by automation tool ? Give example of automation tool you used?

Know every detail because its my last chance to pass if you need to ask me any thing please tell me . Upload my term paper and note from professors.