Speed up the loading time of my site

Question

Premise / What you want to achieve

I'm the owner of my site GraduationMall
. Recently, the loading time of that site is extremely slow.

Problems/error messages that are occurring

Needs to accelerate the page speed

Corresponding source code

Please check the html/javascript/css/php code on our site

What I tried

I tried to refresh the caches of my site, but that didn't work.

Supplementary information

N/A

Comments

[graduationtips]

okay