What is the best campaign for retargeting?

There is no one-size-fits-all answer to this question, as the best retargeting campaign will vary depending on the specific goals and target audience of the advertiser. However, some best practices for retargeting campaigns include developing targeted ad content that is relevant to the user's previous interactions with the brand, and using data from web analytics to segment users and create customized messages. Additionally, it is important to keep retargeting campaigns fresh and relevant by regularly testing and tweaking ad content and targeting criteria.