Go to File > Save for Web & Devices and choose file format, compression, number of colors on the left side of window. Preview in Web Browser from bottom of Save for Web & Devices window.
By using photoshop of course
When you show your products photos to your customers and need to edit them, you will use adobe photoshop.
Photoshop is still recommendable for editing photos.
black and white photos are in style now and is effective
photoshop
First save photos on hard drive, right click on photo then choose Save or Save As, then open it Photoshop throught File - Open
There are several features of the Corel Photoshop software. Some of the biggest features of the Corel Photoshop software is the ability to edit photos.
A photo editing software. It is consumer version of Adobe Photoshop and have most of Photoshop features. Elements costs 1/6 of Photoshop price.
Picnik Photoshop Pizap befunky
Adobe Light Room is an extension of Adobe Photoshop, which allows you to professionally edit your digital photos. With Ligthroom you get some advanced tools in Photoshop to make your photos striking.
You can rank your images in Photoshop Bridge, which is program for searching images on computer, adding tags, ranking and so on. Photoshop Bridge comes with Photoshop, so if you have Photoshop installed you have and Bridge. See related link.
Technically Adobe Photoshop is not a photo processor. Adobe Photoshop is just a place where you can edit your photos and other imagery. It has nothing to do with photo processing.