Time to Interactive (TTI) is a web performance metric that measures how long it takes for a web page to become fully interactive for users. This means the time from when a user first requests the page until they can interact with it, such as clicking buttons or filling out forms. A shorter TTI indicates a better user experience, as visitors can engage with the content more quickly. TTI is an important aspect of web development and is often influenced by factors like JavaScript execution, network latency, and the overall size of the page. Developers aim to optimize TTI to enhance user satisfaction and improve site performance, ultimately leading to better engagement and conversion rates.