A/B testing, split-testing: enables to test two versions of the same e-mail campaign or of the same webpage, in order to determine the one that fits best with the objectives of the campaign.
Subscriber: users that have subscribed to your newsletters from your website.
Advertiser: or marketer, the person responsible to launch an e-mail campaign, so basically you.
ASP: « application service provider », web application using its own servers and routers without being installed on your computer..
B2B (BtoB): Business To business, relation from professional to professional. See the e-mail campaign.
B2C (BtoC): Business To consumer, relation from professional to user.
Call-to-action: image on which you can click with an aspect that appeals the user and makes him want to go to the website.