What is an attribution model?

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