Here are on sharing images via Twitter:

Don't spam.

Snapping a pic of every product your company offers and pushing it onto your followers is a good way to get unfollowed. (Fortunately, you can delete archived images in the new galleries.)

Use high-quality pictures.

This doesn't mean you need high-resolution photos (smartphone pics are okay), but share images of your business, employees, or products that you would be proud showing off to anyone, because they'll now all be archived on your profile.