The way you place emphasis on the page in Sub Titles enhances those items.
The higher and larger the item the more value Google places on the information.
Images are indexed seperately in Google.
They carry great value because Google will know if your image is stolen and also know if it is popular. Hence an image that is popular, well named and has a descriptive alt tag is great for SEO.
<img src="An-Explicit-Name.jpg" alt="SEO useful description" />
Never has the opportunity to broadcast a video to the world been available to so many.
Adding video to your page can add value. YouTube can be a useful tool for SEO even if the link is a 'nofollow' (no value) link.
Refer Using the potential of YouTube
Developing effective email strategies can really benefit your business.
Popping up a subscribe alert however can be counter productive if the visitor is new to your site.
People may subscribe to-:
1 Get discounts.
2 Get exclusive information or offers
3 Because they want to stay in touch with you
Refer Business Email Tips
Google My Business
Legitimate reviews offer a quick source of validation to people on your site.
Your Google My Business ranking is not solely based on reviews.
Scam apps (fake reviews) etc are causing issues.
People are checking for what appear to be real reviews rather than simplistic contrived ones.
Photo Galleries are valuable sources of SEO.
Galleries can also be used on individual pages and blogs etc
Individual images can have a direct link and pop-up a specific gallery image.
<img src="https://www.gcsailingcharters.com.au/PhotoGallery#1-group-1" alt="Serrano Boat Hire" />
Grid systems like Bootstrap allow sections of a site to be divided into a grid.
Usually 12 columns which can receive specific instructions as to how they behave depending on the screen size.
<div class="col-lg-3 col-md-6 g-mb-40 g-mb-0--lg">Some Content</div>
Shopping Cart SEO
At the core of an Online Shopping Cart are products.
The site structure and product structure allow many SEO opportunities.
Managing data within a website offers improved SEO opportunities.
The more efficient and SEO friendly the product pages the wider the keywords that can be targetted.