Google Street View cars capture images from public roads, which might include your home. If an image contains inappropriate content, or you prefer your home not be shown, you can request it to be blur
In case you ever wanted to blur your house from google street view you can. A little privacy i suppose, its pretty easy. you dont need a reason to do it. This probaly the only thing google lets opt out of which is cool.
I find these "privacy" features very funny. Not strictly streets-related, but there are also apps like Google Earth, satellites.pro and such. I find it funny how one such service decides to blur out military complexes of some countries while another one does not and displays them clearly in the satellite photos.