This is SHOULD HAVE step to make your site more secure but it requires technical knowledge about the server system. Therefore, please feel free to contact your system admin or hosting provider for help if you are not familiar with server stuff.You should grant
- Grant permissions of files and folders to "webserver user" account
- All files have permission 644
- All folders have permission 755, except:
- 2 following folders have permission 777:
Note: "webserver user" is a user account on server which can run web or PHP command. In Linux system, this user is usually nginx or apache or www-data.