To create custom maps, go to Google Maps and sign in to your Google account. Once signed in, click on the "My places" option. From there, you can click on the "Create Map" option. Give your Map a name and description, then add locations by clicking on the "Add Marker" option. You can add details about the location for each point, including the name, address, and description. Once you're finished, you can share your Map with others by clicking on the "Share" option.