A more thorough explanation:

A successful party is a term used in legal cases to refer to the party in whose favor a judgment is rendered, regardless of the amount of damages awarded. This party is also known as the prevailing party.

For example, if a person sues their landlord for not returning their security deposit, and the court rules in favor of the tenant, the tenant is considered the successful party.

Another example is when a company sues a former employee for breaching a non-compete agreement, and the court rules in favor of the company, the company is considered the successful party.

The term successful party is important because in certain cases, the court may award attorney's fees to the prevailing party. This means that the losing party may have to pay the legal fees of the winning party.