Google Drive Add-on to Insert POIs in Google Maps
With this [Mapping Sheets] add-on, you can make better use of any geographical data you may have in your spreadsheet. If you’ve ever wanted an easy way to quickly plot locations from your data onto a Google Map, this is it.

Here is the link to the whole article. I am referring to the Mapping Sheets section.

Here is the link to the Add-on:
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