Design patterns offer several benefits when implemented in a software application. Some of these benefits include:

1. **Reusable Solutions**: Design patterns provide tried-and-tested solutions to common programming problems, making them reusable across different projects.

2. **Improved Code Readability and Maintainability**: The use of well-known design patterns can improve the readability of your code, making it easier to understand and maintain. They provide a standard terminology and are specific to particular scenarios, which makes the code easier to follow.

3. **Reduced Development Time**: By using pre-defined design patterns, developers can save significant time. They act as templates that allow developers to apply generic solutions instead of having to reinvent the wheel every time they encounter common problems.

4. **Facilitates Communication**: They provide a common vocabulary for developers. When developers refer to a pattern using its name, others can quickly understand the design and its behavior, even if they're not deeply familiar with the specifics.

5. **Code Flexibility**: Design patterns often emphasize object and class composition over inheritance, which promotes greater flexibility in the code. This makes it easier to modify, add new features, or change the behavior of your application.

6. **Modularity and Separation of Concerns**: Many design patterns (such as MVC) help in structuring your code in a way that separates different functionalities. This separation of concerns can lead to more modular and understandable code.

7. **Better Software Design**: Understanding design patterns helps in identifying which design pattern is best suited for a given scenario. This can lead to a more effective software design and can improve the overall architecture of the application.

Remember, though design patterns have their benefits, they are tools rather than strict rules. It's important to know when and where to use them appropriately, as an incorrect application of design patterns can lead to unnecessary complexity.