Gather metrics from external career sites (tracking pixel, Cookies, etc...)

Summary

Suggestions on how to gather metrics from external career sites, using tracking pixel , Cookies etc

Content

Hi all, 

Our customer would like to collect analytics and metrics from the external career site. Hence, we are deep diving into 2 main topics:

1. tracking pixel 

2. Track candidates' activities using Cookies

Do you have any best practice and/or experience to share with us in this perspective? What kind of data can you gather with these 2 different options (or even other approaches)? Are there suggested providers for Pixel tracking?

Thanks

Giada