Can someone please explain in newbie words what is the meaning of
php app/console cache:clear
Cannot clear cache with.
The purpose is to initialize any cache that will be needed by the application and prevent the first user from any significant “cache hit” where the cache is generated dynamically.
Real world example: you give some stats that need to be cached so you can write your own service that will be called onto
kernel.cache_warmer event to perform this task "statically".