Selected answers from the Dumb SEO Questions Facebook & G+ community.
Christine Hansen: Group expertA visually impaired or blind person also has money and buys from the internet. As a consumer, I use Google Image Search often to find an item I need. In Google Image Search, filename and alt texts are ranking factors.
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Tim Capper: Group expertAdding to what Christine above has said. There has also been a dramatic increase in businesses being taken to court over disability discrimination - best practise to properly use them.
Michał Borzyszkowski: Pro tip (): Contact you webdeveloper and ask him to put alt text on product Images the same as product name.
He will change 2 lines of code in templates (one for category page and one for product page) and it`s done on all 95, 000 or 1, 000, 000, 000 products for existing and all new products