This document discusses common mistakes companies make with B2B remarketing and how to avoid them. It identifies the top 5 remarketing mistakes as: 1) Not expanding remarketing lists to increase reach, 2) Using weak segmentation that doesn't leverage available data, 3) Wasting ad spend on visitors unlikely to convert, 4) Not tailoring messaging strategically based on user progress in the funnel, and 5) Not understanding audience size limitations on different platforms. It provides tips on how to address each mistake, such as expanding lists using search remarketing, leveraging CRM and website data for segmentation, excluding negative signals, taking a sequential approach to messaging, and knowing minimum audience sizes.