The file extension ASA is used for settings files of ASP servers or websites operated with them. The file, commonly called Global.Asa, is optional and includes additional event scripts, variables, functions, and object declarations. All ASP pages have access to the Global.Asa and can use the variables and functionalities defined there so that they do not have to be rewritten in every ASP page.
The Global.Asa file is a plain text file and can be viewed and created with any text editor. Various web page editors, such as Visual Web Developer, also generate this file automatically.
When using manually, it must be noted that the Global.Asa must be located in the root directory of the web server or the ASP application.