[1] An adaptive website adjusts the structure, content, or presentation of information in response to measured user interaction with the site, with the objective of optimizing future user interactions.
Adaptive websites "are web sites that automatically improve their organization and presentation by learning from their user access patterns.
"[2] User interaction patterns may be collected directly on the website or may be mined from Web server logs.
The models are used as the basis for tailoring the website for known and specific patterns of user interaction.
Collaborative filtering such as recommender systems, generate and test methods such as A/B testing, and machine learning techniques such as clustering and classification that are used on a website do not make it an adaptive website.