When it comes to location permission, one of the wonderful feature introduced in HTML5 is allowing website to access user's device location, which will help websites to solve user queries like my location, current location, address of my location, my location's street name and more.
In many situations user required to know the location details like when they are in travel, or sharing their location information to your friends, family member and loved ones.
Always be mindful before sharing your location to unknown location, because location information is one of the privacy information and it is advised to share your location only to your loved ones. If you are doubtful then it is highly recommended to share your nearby landmark location instead of your exact location.
My Blog on My Location and Elevation