What a MOA Looks Like on a VFR Sectional

A military operations area (MOA) is “airspace established outside Class A airspace to separate or segregate certain nonhazardous military activities from IFR Traffic and to identify for VFR traffic where these activities are conducted. Unlike restricted, prohibited areas or TFRs, MOAs do not prohibit the operation of general aviation aircraft. You can, if you want to, fly through a MOA even when it’s “active”.

Sources: FAA, Think Aviation