Aspects of the subject matter described herein relate to predicting and using search engine switching behavior. In aspects, switching components receive a representation of user interactions with at least one browser. The switching components derive information from the representation that is useful in predicting whether a user will switch search engines. The derived information and information about a user's current interaction with a browser is then used by a switch predictor to predict whether the user will switch search engines. This prediction may be used in a variety of ways examples of which are given herein.
among the simpler examples:
1. Performing a query with a different search engine than the previous query;
2. Navigating to a homepage of a different search engine;
3. Querying for a different search engine name (e.g., submitting a query for "Google" to Live Search).
so this will give ms the ability to identify who is most likely to defect to another engine and design their ui to try to retain as many searchers as possible.