Ultimately not my spread of choice as I feel the answer may be incomplete but they do have their place
A one card spread can be used to answer a specific question, for some daily guidance, or for meditation guidance
And there are several ways you can interpret the card you pull; either through straight intuition, through symbolism, or by interpreting the traditional meaning of the card
Try it now for yourself. Ask a simple but specific question, shuffle your deck while doing so, and then choose your card. If you feel like it you can share here in the comments
I drew this card for myself with the question "what will my life look like if I choose to move back in to my apartment for October 1st" (my 2 sons are currently living there, while I am staying at my daughter's place)