Writing is not easy. Everyone who happened to write at least an advertisement for the sale of a piano knows this. For many, the creation of a quotation, advertising text or ordinary business letter turns into almost torture. But for most of us, these skills are vital (albeit not about the piano, but you have to write constantly). It is important to be able to write competently not only from the point of view of spelling, but also from the standpoint of successfully influencing the addressee.