AdWords
Google's CPC (Cost Per Click) based text advertising.  Google applies a weighting factor in order to feature those paid search results that more popular and thus presumably more relevant and useful.

Aesthetic Value
The additional value a property enjoys based on subjective criteria such as look or appeal.

Affiliate
A partner in an agreement where you publish ads or a company’s product on your site and are paid relative to ad performance or product sales.

Affirmation  
A declaration that a certain set of facts are truthful.

Affordability Analysis
A calculation used to determine an individual's likelihood of being able to meet the obligations of a mortgage for a particular property. Takes into account the down payment, closing costs and on-going mortgage payments.

Agency
A contract by which the agent undertakes to represent the principal in business transactions, using some degree of discretion. Also includes legal obligations and rights.

Agent
Person authorized to act on behalf of another in dealings with third parties.

Agent Name
This is the name of the Crawler/spider that is currently visiting a page. Spider is a robot sent out by search engines to catalogue websites on the internet. When a spider indexes a particular website, this is known as 'being spidered'.

Agreement of Sale
An agreement between parties for the sale of real estate. In some states it is synonymous with a Purchase Agreement, Sales Agreement, or Land Contract. In Texas it is known as an Earnest Money Contract.

Alienation Clause
Provision in a mortgage document stating that the loan must be paid in full if ownership is transferred.