Knowing a few technical things about an image - file size, resolution, format, etc., will make it easier to work with digital images.
Metadata is data about data!
Metadata describes a digital image file. It is similar to bibliographic data for books and articles, or food labels, map legends or data on DVDs.
Basically, it describes the Who, What, Where, Why and How of data.
Metadata can be easily manipulated so you might find different (inaccurate?) metadata the same image.
1. Right click on the image.
2. Choose View Image Info, Properties or Get Info.
This is what is shown when you right click on the Google image:
File Size is the amount of space an image takes up. It is usually measured in bytes, kilobytes (1000 bytes), megabytes (1000 kilobytes), gigabytes (1000 megabytes), etc.
File Format - standardized means of storing and viewing images on computers. Each format uses a different compression scheme.