Finders support different data sources to find contacts.
You can choose to retrieve all of the first level LinkedIn connections of a member of your space.
You can configure a saved search for contacts in LinkedIn Sales Navigator or LinkedIn Recruiter to retrieve the results.
You can choose to upload an Excel file containing contacts' information and then find the corresponding LinkedIn profiles.
You can choose to retrieve the LinkedIn profiles of people cited in news articles on the web by configuring a daily news search.