Traffic statistics

Web traffic is the amount of data sent and received by visitors to a web site.
Web analytics is the measurement of the behavior of visitors to a website
Web traffic increase
Web traffic can be increased by placement of a site in search engines and purchase of advertising, including bulk e-mail, pop-up ads, and in-page advertisements. Web traffic can also be increased by purchasing non-internet based advertising.
Organic traffic
Web traffic which comes from unpaid listing at search engines or directories is commonly known as "organic" traffic. Organic traffic can be generated or increased by including the web site in directories, search engines, guides (such as yellow pages and restaurant guides), and award sites.

Traffic overload
Too much web traffic can dramatically slow down or even prevent all access to a web site.

THE Web Traffic Book: A Definitive Guide To Crushing Your Competitors And Getting All The Customers You Ever Need!  Ross Goldberg