Please find the end-to-end list-building process below. I have included the old process in the below document.
It must be noted that the starting point of all our lists is where the major issue arises. The lists we are pulling from Apollo and SN are both incomplete. They do not contain the data that we require to ensure that we meet all the requirements for our campaigns. In most instances, a good amount of the data is outdated and needs to be updated accordingly, although SN is quite a bit better at this than Apollo.
Apollo, for some unknown reason, bulks out their lists with totally irrelevant data and duplicates a fair amount of the data as well.
SN has much better and more complete data available from the raw scrape than Apollo, but both leave much to be desired. At present, there is no other option but to follow the steps below in order to build the lists we need.
OLD List Building Process - End to End (out-of-date)