Ecommerce personalization has become increasingly important for online retailers to provide a personalized experience to their customers, leading to higher order values, stronger conversions, and better return on investment. Personalization involves creating an online shopping session tailored to an individual's needs based on insightful data about their behavior, past purchases, and preferences. By applying best practices such as tracking customer data, using machine learning algorithms, and providing transparent and secure data collection methods, retailers can improve customer satisfaction, loyalty, and retention. The benefits of ecommerce personalization include higher conversion rates, increased average order value, improved customer engagement, and better return on investment, with some studies showing increases in revenue by up to 12%. With the right tools and solutions, such as Algolia's AI Personalization, retailers can implement personalized experiences quickly and easily, while also addressing integration issues and scaling their personalization efforts.