When looking at the Overview of your Analytics dashboard, typically, the majority of applicants are Site Applicants and Posting Responses. Here are the differences: 

• Posting Responses:
  • A candidate is marked as Posting Response in Analytics if they arrived to your company's Careers Page from a job posting on an external site such as Indeed, LinkedIn, Craigslist, etc.
  • Recruiting tracks this source data as long as your company is utilizing the Tracking Links.
• Site Applicants: A site applicant is someone who organically came to your company's website and applied on your Careers screen.