campaign objective

Hi! Can anyone clarify a doubt I have?

In taboola three different objectives for campaign:

BRAND_AWARENESS
The aim is to increase brand awareness.
LEADS_GENERATION
The goal is to find potential customers and get their contact information.
ONLINE_PURCHASES
Purpose is to make online sales.
DRIVE_WEBSITE_TRAFFIC
Purpose is to increase website traffic.

In practice, what is the difference between "DRIVE_WEBSITE_TRAFFIC" and the category "ONLINE_PURCHASES"? Do you know if I can be harmed by informing "DRIVE_WEBSITE_TRAFFIC" when there is interest in "ONLINE_PURCHASES"? Does "DRIVE_WEBSITE_TRAFFIC" affect sales?