If data is being skipped, then it means no required fields are present in that row of data. To learn about required fields, read below.
What fields are required to create a lead?
Lead Name
Lead Website
Lead LinkedIn URL
Contact First Name
Contact Last Name
Contact Email
Contact Phone
Contact Email address
If none of these fields are present, then that row of data in your import will be skipped.
What does this apply to?
Manually Creating Leads
Importing Leads
Creating Leads via Zapier