German contract law is the set of rules that explain how two people can agree on something and make sure they both keep their promises. Imagine you and your friend want to play together, but you both want to make sure that you can quit the game anytime you want. So you decide to sign a contract, which is a piece of paper that says what you both agree to do.
In Germany, contracts are a big deal. They have to be fair and clear, and people have to be able to understand what they are agreeing to. This is because contracts are legally binding, which means that if you break your promise, you can get in trouble.
One important thing to know about German contract law is that it divides contracts into different categories, depending on what the agreement is about. For example, there are contracts for buying and selling things, contracts for renting things, and contracts for doing work or providing services.
Each of these types of contracts has its own rules, but there are some basic things that all contracts have in common. For example, they must be in writing, and they must be signed by both people. They must also include details about what each person is agreeing to do, when they have to do it by, and what will happen if they don't do it.
If there is a problem with a contract, like if one person thinks the other person broke their promise, they can go to court to try and resolve the issue. A judge will look at the contract and decide who is in the right. This is why it's important to make sure you fully understand what you are agreeing to before you sign a contract.
Overall, German contract law is all about making sure people keep their promises and treating each other fairly.