I'll try to explain a little bit more.
I'd like to give the script a parameter which could be used then in the script. Idea would be similar as using functions (object etc.) with paramters in normal programming languages.
My actual problem is that I need to update file using scp. However the name of the updated file differs everytime. So instead of writting
scp file.html email@example.com:directory/subdirectory/webpage.html
everytime, I' d like to create a script which takes file.html as parameter and executes the scp ... command with the given file.html.