R

Ranking: The placing your website gets when visitors conduct a search for your keywords or keyword phrases using a search engine. (The most "relevant" response would be the top ranking.)

Reach: The amount of different types of people who see an ad or message, including a website. Popularity.

Reciprocal link: A link you place on your webpage with the understanding that the linked webpage will create a link to your site.

Referral page: A webpage which links to your website and sends traffic. The URL will appear in your website's server logs, or in The Counter's analysis of your traffic. A good referral page can be worth more than a good search engine ranking, since it is likely to last longer.

ROI: Return on investment. A marketing term pointing out that paying money to market yourself is worth it as long as you earn more money from the advertisement than you spent on it. Make an effort to measure your results from marketing efforts, so you can evaluate and improve them.

ROS: Run Of Site. An advertising package involving many ads on one website, where the website selling the space chooses where the ads appear.

ROTFL: Chat and newsgroup abbreviation of "rolling on the floor laughing."