Cancelling events that are likely to draw crowds is an example of social distancing. Social distancing is deliberately increasing the physical space between people to avoid spreading illness. Staying at least six feet away from other people lessens your chances of catching COVID-19.
Other examples of social distancing that allow you to avoid larger crowds or crowded spaces are:
Working from home instead of at the office
Closing schools or switching to online classes
Visiting loved ones by electronic devices instead of in-person
Cancelling or postponing conferences and large meetings