Cost Per Acquisition (CPA)

A calculation of the cost for an ad or marketing campaign, compared to the amount of trackable revenue it provided for the company. ROI is an important metric for many campaigns, because it relates directly to the profitability of an ad or project.

Sometimes revenue can’t be tracked precisely and attributed to an ad or campaign, though many digital ads are now able to provide this granular tracking to aid in business decisions.

Two Factor Authentication, often abbreviated 2FA, is a security precaution in which users must use two separate methods of confirming their identity before gaining access to areas of a website that contain sensitive or personal information.

Two factor authentication is considered standard practice in many industries that conduct medical, financial or otherwise personal business online.

CAPTCHA stands for Completely Automated Public Turing test to tell Computers and Humans Apart. A long acronym, but one that simply refers to a basic test that humans can answer quite simply but computers struggle to solve. It is used as a security precaution on many sites.