A method and system for customizing web sites for visitor to increase the likelihood a visitor becomes deepens the relationship with the web site or becomes a customer is disclosed. A progression level design defines levels and conditions for moving between those levels. At each level, the web site is customized in predetermined ways commensurate with that level. Information on the visitor is gathered to evaluate their level and possibly upgrade or downgrade that level. Reports detail flow of visitors between levels for various time periods. Where that flow is not desired, the progression level design can be changed by adding, removing or changing levels and conditions.