anyone can help me to solve a problem.
When I made some change to files in public folder no changes appear on fontend.
Even if I delete the css folder site sill is styled.
Someone has told me that you must rebuild project but… is the first time I hear this!
We probably need more information about your project setup, but the first thing that comes to mind is any cache mechanisms that may be runing.
Can be browser cache, you can clear it.
More specifically, if you’re using Twig, make sure that Twig is setup to re-scan and re-compile your template folder … this will ensure that changes you make to templates are picked up when a new request is received.