Okay kiddo, you know how you have your favorite songs and they play on the radio all the time? Well, at the end of every year, a group of people who keep track of all the songs that get played on the radio, on music videos, and through music streaming services, make a list of the top 100 songs from that year.
This list is called the Billboard Year-End Hot 100 Singles of 2014. The word "billboard" here means a big sign with words or pictures on it that you might see on the side of a road. But in this case, Billboard is the name of a company that keeps track of what songs are popular.
So, the Billboard Year-End Hot 100 Singles of 2014 is a list of the most popular songs from that year. People love to see this list because they want to know if their favorite song made it into the top 100, and which songs were the MOST popular. It's kind of like a popularity contest for songs!
Does that make sense? Is there anything else you'd like to know?