Official Google Talk on Images and SEO
is preferred over
Nice to see that lazy loading is getting love from Google It is a killer feature for a lot of users with a slow connection and poor data packs.
Adding images with context to articles helps.
Be smart with image placement
Use a nice layout
alt attributes help
High quality, good resolution images helps
Good images expects good content
Responsive website is a standard now
Use robots.txt if you want to block your images from being displayed in Google search
Add relevant Structured Data
Add licensing information
Lazy loading helps