Imagine your website is a popular store in the midst of the Black Friday online shopping frenzy, and hordes of customers are lined up at your door, eager to get in and buy your merchandise. But here's the problem, your store can only hold so many customers, and if there are too many, the store will become crowded, the quality of service will decline, and you may even close down because you can't handle the excessive pressure. This is the kind of problem you can face with your website, especially when there is a huge increase in traffic. So, what do we do? Let's introduce a super-engineer called "load balancing"...