This endpoint is for seeing all records of questions, answers, reviews, and implementations. It provides a well-rounded summary of the number of files of each type that were created as well as the mean times of modification.
Additionally, you can even search for specific strings, and subsequently, an analysis of the questions containing that string is displayed. For e.g., say one wants to search for questions containing the word 'recent'. They can simply type this into the textbox and then proceed to view the results.
In case you need data about a reviewer, entering the registration token in the reviewer search displays all the relevant information such as latest question asked, question answered, reputation score, etc