Employers try to decide if the person is qualified and seems to be someone who is suitable for the organization
Job seekers evaluate the people they meet, the questions they are asked, as well as the locations, the commutes, and whether or not the jobs seem like good jobs for them.
Both sides of the process have an opportunity to evaluate the "fit." Does this feel like a good match?
This book will help you understand what you need to do: help you be well-prepared for each interview, answer interview questions well, follow up appropriately (thank you notes), and succeed.