How would you SEO this page?

Marketing
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And SamA74, might I ask a question regarding:

I also mentioned captioning, this can be done using the figcaption element within a figure element:-

Nice bit of text which describes what's in the picture for the benefit of robots and the visually impared Hilarious caption to accompany the cartoon

How does someone access this code for each cartoon? Do we go into our CSS or?? It would be interesting to see the proper steps for an image