Nowadays, paper is a sheet of tiny fibres pressed together. Fibres are elongated pieces. Fibres from wood and other parts of plants are mainly used to make paper.
The fibres are mixed with water to form a kind of pulp. The pulp is scooped out with a sieve so that the water can run off. Usually, this mass is also pressed and then glues itself together to form a solid paper. In today's paper, however, chemical substances are used to make the paper thinner, smoother and more tear-resistant.
Apart from writing and printing on it, you need a lot of paper today to wrap something up. If it is thicker, it is called cardboard or paperboard. Thirdly, there are different types of sanitary paper for the toilet, as handkerchiefs and many other things.