1. The document discusses basic concepts of vectors including definition, notation, representation, addition and subtraction of vectors, and multiplication of a vector by a scalar. 2. Key concepts covered include vectors having both magnitude and direction, common notations used, graphical representation using arrows, and properties of vector addition and multiplication by scalars. 3. Methods for adding vectors including the triangle rule and parallelogram rule are explained, as well as multiplication of a vector by a scalar which changes the magnitude and direction.