There are a number of common optimization techniques that can be used to improve the user experience. One common technique is to optimize the loading time of pages. This can be done by reducing the size of files, using caching, and using a content delivery network (CDN).
Another common technique is to optimize the design of pages. This can be done by using a responsive design, using a mobile-first design, and using a flat design.
Finally, another common technique is to use A/B testing to improve the user experience. This involves testing different versions of pages to see which one performs better.