In recent years, website performance optimization has begun to be taken very seriously by both developers and business. With the growing awareness of the business about the impact of website speed on user experience, the high score in tools such as Lighthouse began to become more and more crucial. Last year, some performance metrics began to be taken into account by Google in SEO, which made good performance important for virtually every website that wants to rank high on Google. During his presentation, Filip wants to show that building efficient web applications doesn't have to be difficult. Knowing what affects it and following a few good practices, we can make each application work quickly. You'll learn how to measure performance, what affects it and what are the most common mistakes. You'll also learn the most effective ways to optimize the performance of web applications.