User adoption of new products can be modeled using Rogers' diffusion of innovations theory. This theory outlines five stages of adoption: awareness, understanding, experimentation, adoption, and institutionalization. Data on user behaviors can be tracked through various touchpoints like website visits, documentation views, paid support, and downloads. By understanding which user groups are in different adoption stages, a company can plan customized support like technical information for innovators in experimentation, access to engineers for early adopters in understanding, and case studies for early majority in awareness. This helps maximize adoption rates over time.