Imagine you have a toy that you really love playing with, but one day you accidentally break it. Your parents can either decide to fix the toy or just buy a new one for you.
The concept of "too big to fail" is kind of like that. It means that some companies are so big and important to the economy that if they were to fail or go bankrupt, it could cause a lot of problems for everyone.
For example, banks are really important because they hold people's money, give out loans to businesses, and help the economy run smoothly. If one of the big banks were to fail, people would lose their money and businesses might not be able to get the loans they need to keep running. This could cause a big chain reaction, where the whole economy starts to slow down or even stop.
So, when a company is deemed "too big to fail," the government might step in and help them out if they start to struggle. This could mean giving them money to keep going or other forms of support. The idea is that keeping these big companies afloat is important for the economy as a whole.
Some people think this is a bad thing because it can encourage companies to take big risks, knowing that they'll be bailed out if things go wrong. Other people think it's necessary to keep the economy running smoothly. It's a complicated issue, but that's the basic idea behind "too big to fail."