Yeah I had a hard time with this too at first. Your PID is a number that gets created when you add a web site to CJ's system. Log into CJ.com and click Account, then Web Site Settings, and then Add a New Web Site. Fill in the info for the site you want to use. When you're done you can select that site from the dropdown. You'll find the PID listed in the information for that site. The SID is a name you create. Use anything you want to identify the source of the sale. BANS uses the keyword assigned to the page where people clicked to get the listing. SIDs are optional. PIDs are necessary to get the proper credit. Hope that helps!