How can B2B companies track the same users across different channels and devices?

How can B2B companies track the same users across different channels and devices? Is this something Windsor can help with?

Person A can see my ad on Facebook, go to my website, download a white paper, not do anything for 2 months and come back and get another whitepaper, and finally book a demo. How do I track Person A?

Windsor.ai admin: If you using google analytics it possible to use some user with cache on it (cache can be configured for specific period)

ok