Millennials, often known as Generation Y, are the group of people who were born between 1981 and 1994. Currently, 72.1 million of them in the United States are between the ages of 25 and 40. The Gen Y category is now commonly referred to as “Millennials.” Generation Y is divided into two groups: Gen. 1 and Gen. Y 2. There are approximately 31 million members of Gen Y.1 (those aged 25 to 29) and Gen Y.2 (those aged 29 to 39) in the United States. Marketers can benefit from these terms, which also have a tendency to become widely used.