Composer allows publishers to set cookies on the user's browser following any event. Setting cookies is especially powerful because it allows you to segment users solely based on their activity on your site.
While reading this FAQ, it may be helpful to refresh your memory on how the set cookie card works, a description of which can be found here.
One implementation of the set cookie card is using it to retarget users who saw an offer but chose not to convert. To do this, you could apply the cookie to all users who see an offer by adding the set cookie card wherever you include a show offer card. By doing so, you have effectively tagged every person who has seen an offer.
However, this segment alone is not particularly useful; if you target this segment, you will be reaching out to several users who converted on a term in that offer, which is a waste of your resources and their time. Instead, you can narrow this segment further by choosing to target only those people who do not have access to any resource, which is an indication that they did not convert. Now, you can target these people with a special offer or promotion, capitalizing on a group that you may have otherwise lost.
There are numerous applications for set cookie, and we hope that this example inspires you to leverage cookies in a manner that best helps your company drive sales.