What is the key difference between creating a lookalike audience based on website visitors versus creating one based on email lists?

The key difference lies in the behavioral data used to define the lookalike audience. A lookalike audience based on website visitors relies on browsing behavior and website interactions tracked by the Quora Pixel, reflecting interest in specific products, services, or content. A lookalike audience based on an email list, on the other hand, is based on individuals who have already provided their contact information, indicating a higher level of engagement and potential purchase intent. The website visitor lookalike is useful for expanding reach to those with similar interests, while the email list lookalike is better for finding prospects similar to existing customers or leads.