There are many reasons that the current Census 2020 that is being conducted now is important. Results from the census help determine how federal funding is distributed into states and communities. It can help aid hospitals, fire departments, schools, roads, highways and more. Results determine how many seats in Congress each state gets. And our vote at the polls help determine who sits in those seats.
The Census is conducted every 10 years. The first Census was conducted in 1790. The US Constitution Article 1, Section 2 mandates the Census. You can participate by going to 2020census.gov.