How to Promote YOUR book on Amazon discussion

What is everyone's view on linking books on Amazon KDP via the 'series' function? My books are autobiographical, non fiction accounts of my travels around the world. They have different titles, and either could be read first. However, they obviously include the same lead character (me!) and are within the travel genre.
I've read conflicting information whether Amazon require the books' covers to reference that they're in a series. (Later info suggests this is no longer important?)

I understand the benefits of a series in that it provides greater visibility of both titles to readers and also allows for 'bundled' price promos. However, my understanding is that if a book is added to a series, it then references this when displayed on Amazon. eg my book The Two Week Traveller would say something like - The Two Week Traveller (Book 1 in the series Matthew Lightfoot Travel books). Is that correct? I'm not keen on that as it suggests you have to read both books rather than being standalone works.

I'm interested to know the views of others and whether anyone has experience of using the series function on Amazon?

Thanks for sharing the use of Amazon series function. I am a passive writer, who loves writing. I am working as an professional consultant at a nanny agency (website - https://www.mypoppin.com ), and I used to find time apart from career in writing and also loves to read.

Reading brings in some refreshing moments as we run through the characters and situations, forgetting everything about what we are in. In that sense, i often find reading and writing to be a tool to free from stress that the professional life gives to me.

Thank you for sharing this amazing information on how to promote on Amazon discussion
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Reading provides some rejuvenating moments as we race through the people and circumstances, forgetting about our surroundings. In that regard, I frequently find reading and writing to be a tool for relieving the stress that my work life brings.

You might like to read my three humorous fiction books
Confessor Joe Books 1-3. These are short books and inexpensive.