Name the images with keywords of the website.
The images in the content must always be booked Alt Text.
Add link onbound and link outbound for images if required.
I think if you have quality images and videos in your website, it will attract customer to spend quality time in your website, and if you have traffic, it automatically help you in Google Ranking.
Image SEO is relatively easy, as far as SEO goes. By committing a little extra time to find the right images and optimize them for search every time you add a page to your website, you can give your pages an extra edge in the search engines.