I have not found much that can provide useful advice. And indeed, lots of conflicting advice. I wish those who were more successful at SEO could share what the top 3-4 things that really need to be done to turn SEO into actual conversions and revenue generation. Lots of fluff out there.
SEO is much deeper than that and what's needed for your use case, depends entirely on your situation. At it's simplest, it's content + backlinks but to do it well, you have to get into the weeds.
Microinfluencer is the fancy internet word for free samples online to specifically chosen people. Either for direct conversions or some small level of word of mouth.
And what do you mean by microinfluencers?