The very foundation of every edge. If correctly set, a wicked 1K edge is a beautiful thing. Seriously. It begin on the 1K and nothing else will matter unless that is correct.
https://sharprazorpalace.com/honing/...ggestions.html
This thread has great pictures and good instruction.
When setting the bevel, and making the two planes of the apex touch, creating the perfect edge, the sides of the bevel are completely irrelevant. The link shows it far better than I can explain.