Interest-based advertising: How it works – Google Ads Preferences

by Ivan on May 12, 2009

Did you ever stop to think just how does Google Ads work? Well, the good folk over at Google have put up a simple tutorial on how Google Ads works. It’s very high level but leads to other pages where things get more technical.

Google’s AdSense program tries to show ads as relevant as possible for each visit. The following example explains this new technology step by step:

Mary’s hobby is gardening. With Google’s interest-based advertising technology (i.e. Adwords), Mary will get more relevant gardening ads because she visits gardening websites. Here’s how that works:

1. When Mary visits websites that display ads provided by Google’s AdSense program, Google stores a number in her browser (cookie) to remember her visits. That number could look like this: 114411.

2. As many websites that Mary visits are related to gardening, Google puts her number (114411) in the "gardening enthusiast" interest category.

3. As a result, Google shows more gardening ads to Mary (based on her browser) as she browses websites that use AdSense.

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