Fill in the blank: An attribution model is _____.

the use of artificial and machine learning to buy ads in real-time, instead of going through human negotiations and pre-set prices
an online advertising method in which marketers place ads on search engine results pages (SERPs)
a code that gets generated and stored on a website visitor’s computer when they visit your site
the rule, or set of rules, that determines how credit for sales and conversions is assigned to touch points along conversion paths

The correct answer is:

the rule, or set of rules, that determines how credit for sales and conversions is assigned to touch points along conversion paths