The phrase "to share an image" means to send or show a picture to someone else.
Sentences with «to share an image»
The site also shared images of the three new color options of the Pixel 2, but it didn't provide information on where it found the images. (ibtimes.com)
With digital images, your pet's veterinarian can interpret the findings immediately and also share the images with specialists as needed. (pinnaclevets.com)
Same goes for sharing the image on social media, which you can share instantly using the social media share buttons available. (blog.kissmetrics.com)