When your ASP.NET web sites are localized, you can store your resources as local or global resources. A local resource is specific to a specific page, which is the only one that can access it, while global resources can be accessed from anywhere.
Local resources are placed in the special App_LocalResources folder, while global resources are placed in the App_GlobalResources folder. Local and global resource files will look exactly the same, so only the obvious difference is the folder that they are put in. However, they are used separately, for example, with local resources, you need a resource file for each of your pages, and if you have a website with 10 pages for each additional of each desired language , Then each language in two other languages, in addition to the default language, will be the amount of 30 resource files, with global resources, Area per'll only need one file (but not limited to), even if you have many pages. On the other hand, each of these files can be very difficult to manage, if your site has many local content
You'll always need some global resources, but if you want, you can leave local resources and use only global people. It really is on you