Borderless selling means selling products or services online without any geographical barriers or limits. It is like selling things to anyone in the world, no matter where they live. For instance, if you were selling toys, you could sell to someone who lives in China or Australia, even if you are located in America. This is possible because of the internet, which allows people to buy things from other countries without leaving their own homes. With borderless selling, you can reach a much larger audience and increase your sales. It's like having a big toy store that anyone in the world can come and visit at any time.