The best advertising networks offer affiliate programs to help publishers and advertisers connect. These networking options help websites rent or sell ad spaces to online retailers to promote their products.
It is vital to calculate the returns on investment through this marketing strategy. Hence, publishing firms use an ad revenue calculator to analyze the performance of ads on their website.
It helps them calculate the total revenue generated from the commissions paid by advertisers.

Source: https://www.entrepreneurshipsecret.com/ad-revenue-calculator/