Overview
There are two ways in which you can import your contacts, those are with basic search and sales navigator.
To import with Basic Search
Open the campaign to import contacts to
Click Add Contacts
Choose Basic Search
Connection level 1 will be selected by default
Click on Start Search
To import using Sales Navigator
Open the campaign to import the contacts to
Click Add Contacts
Click on Sales Navigator
Click Search with Sales Navigator
The 1st connection filter will be selected by default
Use the necessary filters and click Start Search