I'm not an art expert. I like art, and in particular street art, so that is what I will write about. You may find the odd post about an exhibition or an art museum, but most of my posts will be about the art that is there for everyone to enjoy. You'll find I'm a cheapskate when travelling. I like to visit those places where I don't have to pay for it, so street art is right up my... alley.
According to Wikipedia street art is “…visual art created in public locations, usually unsanctioned artwork executed outside of the context of traditional art venues. Other terms for this art include "independent public art", "post-graffiti", and "neo-graffiti", and is closely related to guerrilla art.
But when is it street art and when is it vandalism? According to https://davidcharlesfox.com/what-is-street-art-history-definition-purpose-importance/ the legal distinction between permanent graffiti or other forms of street art and official art is permission.