Impressions are the people who see your ads
Clicks are the people clicking on your ads
Cost per click (CPC) is the cost to get someone to click on your ad
Conversions are the calls, form fills, or downloads
Cost per conversion (CPC) is the number of clicks it takes to get a call, form fill, or download
Cost is the amount of money spent in that time period
Return on ad spend (ROAS) is the amount of money that is earned for every dollar spent on a campaign
Lifetime Value (LTV) is the amount of money customers spend with your business over the course of the engagement