To enable you to learn to sail, you need to familiarise yourself with the various parts of the boat, sails and rigging. The terminology that you learn here will be used throughout your sailing career by fellow sailors and sailing instructors.
Point of sail is a term used to describe a sailing boat's orientation in relation to the wind direction. Sailboats cannot sail directly into the wind, nor on a course that is too close to the direction from which the wind is blowing.
Whether you're a boating fanatic, into rock climbing, or just someone who would like to know how to attach a rope to something, you're going to need to know how to tie knots. Each knot has a purpose and is easy to undo.
The sensible sailor needs to know how to handle and store all that cordage so that it will be up to the job and ready for any eventuality. Using the wrong knot or line could lead to trouble, while getting it right, will enhance the your experience on and off the water.