No ALT TAG in home page images

[fumagare]

Hello, I would like to ask a question:

Prestashop 1.6

doing an audit in my site using semrush, I received a report saying that some images do not have TAG ALT.
The images that have no alt tag fican in the home, slides, images in modules, images of categories ... nothing

Only the product page has a tag alt.

How do I put alt tag on other images?

 

in this image shows the audit of the semrush saying that it does not have alt tag the images that remain in the directories:
/ large_default /
/ modules /
/ img /

https://prnt.sc/nn4dog

 

example home image that does not have alt tag:

tps://prnt.sc/nn4erw

 

Can someone help me, need to add some code on some page?

thank you

Edited May 11, 2019 by fumagare (see edit history)