The purpose of this research is to determine how the marketing strategy improves the purchasing behavior of the pizzeria customers of El Campanario, Huamachuco -Province of Sánchez Carrión, 2019. The research problem was How did the proposal Marketing strategy improves the buying behavior of the pizzeria customers El Campanario, Huamachuco - Province of Sánchez Carrión, 2019? being the hypothesis the marketing strategy significantly improves the purchasing behavior of the customers of pizzeria El Campanario, Huamachuco-Province of Sánchez Carrión, 2019. The study population was made up of approximately 1344 customers served during a month, whose sample was 90 customers of the pizzeria El Campanario. The research design was descriptive and correlational; the methods used are deductive, inductive, analytical, and synthetic. The data collection techniques used were the survey, intervi...