Personalization is the output of a Targeting & Segmentation process. Once the segments are defined and a Behavioral Targeting campaign is performed in order to define which content and design is the right one for a specific segment of visitors, the website should be personalized for this segment.

Testing is one of the most important techniques when it comes to website optimization. It shows us what the users like, how they react to design, which content they are looking for, which offer is more attractive, and so on. However, "users" are not a bunch of robots with the same needs and tastes.
Daniel Waisberg -
Behavioral Targeting (BT) has gotten a lot of attention as one of the best ways to optimize online advertising. First of all, BT delivers results: a recent NAI study showed that BT is more than twice as effective as non-targeted ads. Second, according to eMarketer, companies are spending money on BT ads: BT ad spend will represent 25% of total US display ad spend in two years [...]
Phillip Klien -