As well as the feature image, it is beneficial to add other digital assets or media such as videos, infographics, charts, statistics/tables etc.
The creation of those is outside of the scope of this basic blogging effort, but if you have any of those on hand, then you can certainly add them if relevant.
You can embed relevant videos from YouTube.
Also, check your files for old brochures, marketing material, specifications etc. Often there is a treasure trove of useful material here which can really enrich a blog post. Scan them if they are hard copy, and get them ready for insertion into your blog post.
That’s out next topic.