These columns are tracking columns that are used for email marketing campaigns.
clickts - Is the date/time that someone clicked a link
clickip - Is the IP address of the person that clicked the link
viewts - Is the date/time that someone viewed the message
viewip - Is the IP address of the person that viewed the message.
engagementscore – is a number that is increased every time an action occurs by the user. Refer to our FAQ topic on engagement scoring.
These columns are overwritten anytime a list is used in a campaign and stores the last time a user viewed a message or clicked a link.