Optimizely uses Optimizely to run experiments on various pages of their website like the homepage, glossary pages, resources, and login page. They experiment with content, layouts, and personalization to meet objectives like increasing engagement, conversions, and reducing costs. The future will see Optimizely running more experiments by making experimentation easier for all teams through tools that integrate with their content management system and enable experiments without developer involvement. They aim to get everyone in the organization involved in experimentation.