How to edit photos using online editors and which ones are better to use

Here are some best online photo editor which you can use them for free Canva Adobe Photoshop Express Pixlr piZap Fotor BeFunky

I have never heard of such a program before. Is this new image editing software?

There are many really new and useful photo editing programs out there. There are free ones, for example, such as Movavi photo editor, there are paid programs that are often used by professional designers, for example Photoshop, Adobe editor. You can choose any program you like from the list of graphic editors, but I bet that here https://www.movavi.com/ you will find the most functional and at the same time easy to use tool for making changes to photos.