http://www.newsweek.com/what-incubation-period-omicron-how-long-contagious-covid-variant-1662497

Scientists are still working to gather data on the Omicron variant and there is much we still don't know about it, but some have suggested that it might possibly have a shorter incubation period than earlier variants.

An incubation period refers to the time it takes between someone getting exposed to a causative agent, like a virus, and for symptoms to show up.