Honorary citizenship means that someone who is not originally from a particular place, like a city or a country, is given an award that makes them feel like they belong there.
It's like getting a special present, but instead of a toy or a game, it's a title that says, "You're one of us now!" This present is given to people who have done something really important or meaningful for the place, like donating a lot of money, volunteering their time or skills, or helping to make the place safer or more beautiful.
Honorary citizenship is a way for a city or country to say "thank you" to people who have done good things for them, and to show how much they appreciate their work. Although it doesn't come with all of the same benefits or rights as regular citizenship, like the right to vote or obtain a passport, it's still a really big deal and considered an honor.