1. File size impacts web pages and performance - larger file sizes take longer to download. 2. Creating a graphic in MS Paint as an exercise, the file was smaller when saved as a JPG compared to the default BMP format, demonstrating the effect of file type on size. 3. Compressing a large file like an electronic survey using a program like WinZip can significantly reduce the file size, making it small enough to email within size limits and improving download speed for users.