The colom product name is to be found in the backend. VM component, left menu item shop then select mediafiles. My first colom is called "product name" and is empty.
Ok, now I understood what you are talking about. The column "product name" is currently not used. Maybe it was originally intended to be used if the product is a downloadable file.
Would it be wise to alter multiple images of the same product to "product_image=1" in Jos_virtuemart_medias? And will this be indexed by the Google crawler? Would it improve SEO for google image?
Would have no effect if you images show up in the frontend view. It's (orginally been ) used internally to distinguish between product images and images used elsewhere.
Where can I add the product name from the backend, and where can I set product_image=yes from the backend or can this only be done in the Dbase?
I think normally an image should be set to file_is_product_image = 1, if you assign it to a product. However, from the SEO point of view it is useless to change the setting in the database table.
Either Google simply didn't list all your images yet (Google images is much slower the Google text) or you made some other SEO mistakes.
Do you have a link where I can see the images? (if yes send it as a forum PM)