Ever tried scanning embroidered handiwork on an ordinary scanner - it works very well!
You can see all your mistakes far more clearly when zoomed in on-screen!

You've taken a digital photograph of a picture or a piece of your handiwork.   Now that the resolution which can be achieved using digital cameras and scanners has improved, you'll have a superb picture, but it will be saved in a very large file. Many images require several megabytes!

You may be wanting to make a 10" by 8" print from your picture - if so that's fine.  But if you don't, you probably do not need all the information stored in that large file.

If you have some imaging software, you can reduce the size of your files. You'll need something like Serif PhotoPlus, Corel, PhotoShop, Paint Shop Pro to do this (otherwise find a friend who's got it) to do the following...

Reduce the size of the image file to save disk space, and to allow you to e-mail the image to a friend more quickly, and if putting it on a web page to allow the reader to watch your picture download faster. You can reduce the size of your file  to tens of kilobytes (i.e. a hundred times smaller!) by:

resizing the image to a smaller physical size - this reduces the number of pixels actually stored,
compressing the file, which stored it more efficiently, by saving it as a JPG (pronounced "jay-peg") file.