Urum is a really big word that gets used to describe some different groups of people who speak Turkish. They lived in different parts of Eastern Europe and Central Asia, and have their own special ways of talking and living.
Imagine you have a group of friends who all speak a different language than you. Maybe some people speak Spanish, others speak Japanese, and some speak Arabic. Even though you all speak different languages you can still be friends and play together. That's kind of what it's like with the Urum people. Even though they speak Turkish, it might be a different kind of Turkish than other people might speak.
Some people have compared the Urum people to a big family, with different groups or "branches" that have their own unique traditions and ways of doing things. Sometimes they might visit each other or celebrate events together, but other times they might be separate and do things on their own.
Just like how you might have a special tradition in your family, like eating pancakes for breakfast every Saturday, the Urum people have their own special traditions too. It's what makes them unique and different from other groups of people.