The basic photo editing techniques should be available in even simple editing programs, and each can enhance your images to make them more powerful and shareworthy.
Photo editing is the process of manipulating images in order to enhance their appearance.
There are many different techniques
Cropping and resizing
Adjusting brightness, contrast, saturation, and hue
Removing blemishes and imperfections
Sharpening and softening images
Applying filters and effects
Changing the color of specific elements in an image
Adding or removing objects from an image
Creating a blurred background to emphasize a subject