Go to https://maps.google.com and click this triple bar icon in the upper left2. Click "your places" in the menu3. Click the Maps tab, then click Create Map on the bottom4. Add addresses, then give your map and the layer name better names than the default5. For each location, you can give it a name if you want. Click the location in the left panel, then click the pencil icon to give it a name. E.g. "Uptown location"6.  Once you're done adding locations to the map, click the Share button7. Turn on "anyone with the link can view", then click Close8. Click this triple dot icon and then click "Embed on my site"7. Copy the code that pops up8. Copy and paste that code into the Code View in the appropriate section of your website.  That should be it!