Developer experience is like playing with toys. You know how some toys are really fun and easy to use, and others are hard to figure out? Well, the same thing goes for computer programs. Some programs are easy for developers to use and work with, and others are really difficult and frustrating.
When developers have a good experience, it means they can quickly and easily write code, test it, and see the results. It's like having toys that you can play with right away without any extra work. This makes them happy and satisfied with their job.
On the other hand, when developers have a bad experience, it means that the tools they are using are clunky, confusing, or don't work right. This is like having a toy that you can't figure out how to put together or play with. It makes developers frustrated and unhappy.
So, companies that want to keep their developers happy and productive work hard to create tools and processes that are easy to use and give them a good experience. Just like parents who buy toys that are fun and easy to use for their kids, companies that provide good developer experience make their developers happy and more likely to succeed in their work.