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A-B testing A method of testing in which multiple ads are run simultaneously within the same ad group in order to see which variation is the most effective.
Account The umbrella component that encompasses all campaigns and their respective ad groups. Billing information and reporting are accessed at this level.
Ad creative The content of the ad that includes the ad title, ad description, and display URL. Also referred to as ad text.
Ad description The block of ad text shown directly under the ad title that is used to describe the product(s) and/or service(s) being advertised and to persuade the user to click on the ad. Limited to two lines of 35 characters each by Google and one line of 70 characters by Yahoo.
Ad group An account component that contains one set of keywords and ads. Bids can be set at the ad group level or the individual keyword level.
Ad scheduling A tool (Google only) that allows you to control the days and times that your ads appear. Also referred to as dayparting.
Ad text The content of the ad that includes the ad title, ad description, and display URL. Also referred to as ad creative.
Ad title The first line of ad text that is primarily used to attract the user's attention and persuade the user to click on the ad. Users click on the ad title in order to reach the advertiser's website. Limited to 25 characters by both Google and Yahoo.
Advanced match A match type (Yahoo only) that allows ads to be displayed for broad versions of keywords that may include plurals, misspellings, additional words, and synonyms, in addition to searches relevant to ad text and website content.
Bid The maximum amount you are willing to pay for one click. Also referred to as maximum cost-per-click.
Broad match A match type (Google only) that allows ads to be displayed for broad versions of keywords that may include plurals, misspellings, additional words, and synonyms.
Campaign An account component that contains one or more ad groups that share the same budget, geo-targeting, and schedule.
Click The action that occurs when an ad is selected and its title is clicked on by a user, leading the user to your website.
Clickthrough rate (CTR) A percentage that measures the number of clicks an ad receives divided by the number of times it is shown (impressions).
Content match A match type that allows ads to be displayed on a group of websites, email programs, and/or blogs who have opted to display Google or Yahoo ads.
Conversion The completion of a desired action (i.e. a sale, sign-up, or information request) on your website by a customer.
Conversion rate A percentage that measures the number of conversions an ad receives divided by its number of clicks.
Conversion tracking A tool that links clicks directly to their resulting conversions on your website.
Cost-per-acquisition (CPA) The average cost of acquiring a conversion, measured by dividing total cost by total number of conversions. Also referred to as cost-per-conversion.
Cost-per-click (CPC) The average cost of acquiring a click, measured by dividing total cost by total number of clicks.
Cost-per-conversion The average cost of acquiring a conversion, measured by dividing total cost by total number of conversions. Also referred to as cost-per-acquisition.
Cost-per-thousand impressions (CPM) The average cost of acquiring 1,000 impressions (usually used only in Google placement targeting).
CPA See cost-per-acquisition or cost-per-conversion.
CPC See cost-per-click.
CPM See cost-per-thousand impressions.
CTR See clickthrough rate.
Dayparting A tool (Google only) that allows you to control the days and times that your ads appear. Also referred to as ad scheduling.
Destination URL The specific URL on your website that users are directed to after clicking on your ad. This differs from the display URL in that it is the URL that users are not able to see until they click on your ad. Also referred to as landing page.
Display URL The URL used in your ad that allows users to identify your website. This differs from the destination URL in that it is the URL that users are able to see in your ad. Limited to 35 characters by both Google and Yahoo.
Exact match A match type (Google only) that ensures that your ad is displayed only when a user queries your keyword with words in the exact order you specify with no additional words or variations.
Geo-targeting A tool that allows you to control the geographic area and/or language in which your ads are displayed.
Image ad A graphical ad (Google only) that is displayed on certain websites in the content match network.
Impression The occurrence of an ad being displayed.
Keyword A word or phrase that relates to the product(s) and/or service(s) being advertised. When one of your pre-selected keywords is entered by a user during a Google or Yahoo search, your ad could appear next to the search results.
Keyword insertion A tool that allows you to dynamically update your ad text with the keyword searched via the use of a special modification tag.
Landing page The specific page on your website that users are directed to after clicking on your ad. Also referred to as destination URL.
Local business ad A type of ad that is location-specific and is associated to a business listing in Google Maps.
Match type A tool that specifies how an ad is triggered based on how the keyword is entered by the user during a Google or Yahoo search.
Maximum cost-per-click The maximum amount you are willing to pay for one click. Also referred to as bid.
Minimum bid The lowest amount you can pay per click in order for your ad to be displayed. This amount is typically assigned by Google or Yahoo based on quality score or quality index.
Negative keyword Selected word(s) or phrase(s) that, if included in a Google or Yahoo search that involves one of your keywords, allows you to filter out unwanted impressions by preventing your ad from being displayed.
Pay-per-click (PPC) An online advertising model in which the advertiser pays only when a user clicks on an ad that links directly to the advertiser's website. The amount paid is usually set by the advertiser rather than by the content provider.
Phrase match A match type (Google only) that is more targeted than broad match and more flexible than exact match. It ensures that your ad is displayed only when the exact words within your keyword are queried by the user in the order you specify, with or without additional words before or after the phrase.
Placement targeting The option to display Google pay-per-click or CPM ads on specific categories and/or websites that are a part of Google's content match network.
Position The placement of your ad on the search results page relative to other ads triggered by the same keyword. Also referred to as ranking.
PPC See pay-per-click.
Quality index A metric that Yahoo assigns to each ad that measures the ad's relevancy. As an ad's quality index increases, its minimum bid decreases and its position increases.
Quality score A metric that Google assigns to each keyword that measures the relevancy of the keyword to its ad group and the user's search query. As a keyword's quality score increases, its minimum bid decreases and its position increases.
Ranking The placement of your ad on the search results page relative to other ads triggered by the same keyword. Also referred to as position.
Return-on-investment (ROI) A percentage that measures the amount of profit per dollar spent, helping you determine the value of your advertising efforts. Typically measured by dividing total profit by total cost.
ROI See return-on-investment.
Search engine optimization (SEO)

The practice of working with a website’s content, its exposure across the Internet, and the search engines themselves so that the website is easily discovered and listed by the search engines’ algorithms.
SEO See search engine optimization.
Standard match A match type (Yahoo only) that allows ads to be displayed for exact keywords and their relevant singular or plural variations and misspellings.
URL (Uniform Resource Locator) The address of a specific page or file on the Internet.