Imagine you have a friend who lives in a big apartment complex with lots of other people. When you want to send a letter to your friend, you need to know their address - like their apartment number and street name.
In the same way, when you want to send an email to your friend's email address, your computer needs to know where to find that email address on the internet. This is where MX records come in.
MX records are like a directory or a map of addresses for emails. They tell your computer which mail server (a special computer that handles emails) to send your email to, based on the domain name (like "gmail.com" or "yahoo.com") you type in the email address.
Think of it like a guide dog helping someone get to a specific location. The MX record is the guide dog that helps the email find its way to the right mail server.
So, MX records are really important because they help ensure that your email gets delivered to the right place and doesn't get lost along the way!