Bubble is a leading visual programming platform that allows users to build and host full-featured web apps without needing to code. The platform has the ability to grow with increased demand and traffic, accommodating as much traffic as servers can handle, thanks to its tiered plans and allocation of server space. Users like Max, who built a Fortnite skins site using Bubble, have achieved overnight success, with his app receiving over 150,000 visits within three weeks of launch. To measure traffic, users can track page views, visitors, and metrics in the Logs tab on paid plans, integrating with analytics tools like Google Analytics. The concept of "capacity" refers to how much work an app can do before it cannot keep up, which is managed by Bubble's platform. There is no absolute limit to the number of users that can sign up for a Bubble app, but capacity affects how many users might be able to use the app at once. With hundreds of thousands of active users, apps built on Bubble have performed well, such as Kappa Trainup, which garnered an estimated 28,000 daily users within weeks after launch. To ensure performance, users should consider page load speed, querying speed, and workflow speed, optimizing these factors to improve user experience. Building an MVP on Bubble is entirely free, with premium plans starting at $29 a month for analytics features and hosting on a custom domain. The platform has helped successful apps like Ensemble19, Quoins, Comet, and Dividend Finance, demonstrating its ability to support businesses as they grow.