Dynamic and Dynamic Rotation || SEO Glossary: D

Dynamic:- generated 'on-the-fly' from a database. Also see "database-driven."


Dynamic Rotation:- Delivery of ads on a rotating, random basis. Dynamic rotation allows ads to be served on different pages of the site and exposes users to a variety of ads.

Doorway page || SEO Glossary: D

Also known as a "bridge page" or a "gateway page". A doorway page is a web page full of keyword-rich copy that doesn't deliver any useful information on it other than a link into the site, and whose sole purpose is to be fed to the search engines.

Directory || SEO Glossary: D

Human editors group websites into categories and provide site descriptions or edit descriptions that are submitted to them. With a directory, picking the right category and composing a description rich in key phrases will ensure maximum visibility. Contrast this with a search engine, which is unedited and concerned primarily with the HTML of a site's constituent pages.

Deep submitting || SEO Glossary: D

Submitting URLs of pages deep in your site to the search engines. For example, if a webmaster of 200-page website submits each of those 200 pages. This tactic is frowned upon by some search engines because it unnecessarily clogs up their submission database when the search engine spider could find those pages on its own by exploring links starting at the home page.

Daughter Window || SEO Glossary: D

An ad that runs in a separate window associated with a concurrently displayed banner. In normal practice, the content and banner are rendered first and the daughter window appears a moment later.

Database-generated || SEO Glossary: D

As in "database-generated web page." Means that a web page is created dynamically 'on-the-fly' from a database, in contrast with a static HTML page.

Database-driven || SEO Glossary: D

As in "database-driven web site." Means that the website is connected to a database and web page content is based in part on information extracted from those databases.

Custom Error Page | SEO Glossary: C

You can customize the content and the look-and-feel of the default page that is displayed on your web server when a 404 File Not Found error occurs. A good 404 error page has a friendly message explaining that the page they requested doesn't exist at the location, a site map to encourage the user to continue exploring the site, a search box so the user can conduct a search, and a look-and-feel that matches the rest of the site, including navigation of course. Creating a custom 404 error page not only helps keep visitors in your site, it is also an important part of the search engine optimization process. Inevitably pages on your site will get moved and removed over time. When a search engine spider returns to your site to reindex those now non-existent pages, they will have a set of links to explore in the form of the site map on the custom 404 page. You can test for whether a site has a custom 404 error page by trying to access a web page with a nonsense filename after the domain name in the web site address. For example: www.yourcompany.com/blah

CTR - Click Through Rate

Click Through Rate is a measure of the number of clicks received from the number of ad impressions delivered. 

Crawler | CSS || SEO Glossary: C

Crawler:- See "spider".

CSS:- Cascading Style Sheet - used to control the design of website

Counter | SEO Glossary: C

A simple program which tracks the total number of webpage impressions.

Cost Per Thousand (CPM) | SEO Glossary: C

The cost incurred or price paid for a thousand impressions.

Cost Per Sale (CPS) | SEO Glossary: C

Pricing based on the number of sales transactions your ad generates. Since users may visit your site several times before making a purchase, you can use cookies to track their visits from your landing page to the actual online sale. Also known as cost-per-acquisition or pay-per-sale.

Cost Per Order (CPO) | SEO Glossary: C

Pricing based on the number of orders received as a result of your ad placement. Also known as cost-per-transaction.

Cost Per Lead (CPL) | SEO Glossary: C

Pricing based on the number of new leads generated.

For example, people who click from an ad and then complete an inquiry form is considered to be a lead. The advertiser would pay based on the number leads received.

Cost Per Click (CPC) | SEO Glossary: C

The cost incurred or price paid for a clickthrough to your landing page.

Cost Per Action (CPA)

The cost incurred or price paid for a specific action, such as signing up for an email newsletter, entering a contest, registering on the site, completing a survey, downloading trial software, printing a coupon, etc.

Cookie | SEO Glossary: C

Information placed on a visitor's computer by a web server. While the web site is being accessed, data in the visitor's cookie file can be stored or retrieved. Mostly cookies are used as unique identifiers (i.e. user IDs or session IDs) to isolate a visitor's movements from others' during that visit and subsequent visits. Other data that may get stored in a cookie include an order number, email address, referring advertiser, etc.

Conversion Rate | SEO Glossary: C

The rate at which visitors get converted to customers or are moved a step closer to customer acquisition

Conversion

The act of converting a web site visitor into a customer or at least taking that visitor a step closer to customer acquisition (such as convincing them to sign up for your e-mail newsletter)