Creepy target ads seem to follow you around the web. Here I explore how a few techniques work, and one I can’t explain at all.

https://askleo.com/34702 #askleo #googleads

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About Leo

Leo A. Notenboom has been playing with computers since he was required to take a programming class in 1976. An 18 year career as a programmer at Microsoft soon followed. After "retiring" in 2001, Leo started Ask Leo! in 2003 as a place for answers to common computer and technical questions. More about Leo.

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