The document defines key marketing terms: click-through rate measures user interest in ads, cost per click bills advertisers per click, return on investment evaluates profit relative to cost, and cost of ignoring calculates lost revenue from neglecting social media. It also lists the members of a team - Paige Bollman, Asiana Hung-Barnes, Susan Morales, Julia Ramirez-Vaughan.

1. Chapter 1 Key Terms -
Team Rocket
Paige Bollman, Asiana Hung-Barnes, Susan
Morales, Julia Ramirez-Vaughan

2. Click-Through Rates (CTR)
The percentage of individuals viewing a web page who click
on a specific advertisement that appears on the page. Click-
through rate measures how successful an ad has been in
capturing users' interest.
The higher the click-through rate, the more successful the
ad has been in generating interest. A high click-through rate
can help a website owner support the site through
advertising dollars.

3. Cost Per Click (CPC)
A method websites use to bill based on the number of times
a visitor clicks on an advertisement.
CPC is often used when advertisers have a set daily budget.
When the advertiser's budget is hit, the ad is removed from
the rotation for the remainder of the billing period.

4. Return on Investment (ROI)
A performance measure used to evaluate the efficiency of an
investment or to compare the efficiency of a number of different
investments. ROI measures the amount of return on an investment
relative to the investment’s cost.
To calculate ROI, the benefit (or return) of an investment is divided
by the cost of the investment, and the result is expressed as a
percentage or a ratio.

5. Cost of Ignoring (COI)
Ignoring a social media account and the amount of money lost
because of it.
According to a recent Forbes piece, "social media is more pervasive
than ever among customers: 50% of the population currently use
Facebook and more than 37% use Twitter."