How 'Recommended Jobs Based on Candidate Resume' works. Can other parameters be added?

For the feature 'Recommended Jobs Based on Candidate Resume', From the exiting document we have, we understand that the recommendation is based on the Job Title, Location and Skills, queries are

1. Which Recommendation Algorithm and tokenization method they are using
2. If the functionality is able to check ‘Combined Keyword analyses for the recommendation
3. Can we set the other parameters for the recommendation
4. Can we set the priority or sequence for the checking parameters for recommendation