Career Link is a service to match employers with potential employees. They are the resource the PA Unemployment system uses to help people find suitable work in PA while collecting unemployment.

This link can explain the process for verifying how to meet the requirement to apply for two jobs per week better than I can. It's the work search instructions

I'm not sure how/if the State verifies whether or not a potential employer called or emailed with an offer for an interview. What I have seen is after a few weeks of no offers, no interviews, the person was required to go to the office for evaluation to match them with a suitable job.