Kam S. I was confused about it too but someone suggested me that I should use Apollo to find company size n stuff but it was still going out of budget so i simply paired it w some Apollo scraper called searchleads.co. It provided me w all the verified leads and enhanced it as well.
So I've been reaching out to them using my campaign and had such good results.
So I think you could try it too. Also, it was very affordable for me like $3 for 1k leads.
What are you using currently tho? Would love to hear some more alternatives to compare.