Wool forward - what does it mean? Please help

Hi, I’ve come across some old patterns of my nan’s and it says wl = wool forward. Does anyone please know what it means. I’m new to patterns.
Many thanks.

Wool forward means the same as yarn forward or yarn over. Just put the yarn to the front of your work and do the next stitch called for.

Thank you I shall go and try that - I might be back for more help later!