French knot is one of the easiest of all knots. Interestingly, however, it is often hailed as the one of the most difficult-to-handle or difficult-to-do stitches. This, so much so, that learners often end up hating to do this stitch. I personally feel it is one of the most creatively use-able stitches once learnt, and not much of a deal.
This stitch can be used to do little flowers, or as a filling stitch to fill in small circles and centre of flowers. Many closely done french knots can give a ‘woolly’ appearance and can be used creatively. You use both hands to do this stitch, so I would advise you read the instructions also to understand the illustrations.