In my knitting pattern it tells me to Fold K, does anyone know what this means please.

See if your pattern defines Fold K, either at the top or the end of the pattern. What pattern is it?

Can you please post the pattern name and a link to the pattern? Without that info it’s pretty hard to know what’s going on. If the pattern is in a book then give more info about the pattern. Don’t post the pattern here because it’s a copyright violation.