There are several reasons why a business may choose to work with a digital marketing agency, including:

1. Expertise: Digital marketing agencies have teams of experts who specialize in different areas of digital marketing, such as SEO, PPC advertising, and social media marketing. This expertise can help a business achieve better results from their digital marketing efforts.

2. Objectivity: Digital marketing agencies bring a fresh perspective to a business's marketing efforts and can provide unbiased recommendations based on data and market trends.

3. Time-saving: Working with a digital marketing agency can save a business time and resources, as the agency can handle the day-to-day tasks of digital marketing while the business focuses on other aspects of their operations.

4. Access to technology and tools: Digital marketing agencies have access to the latest technology and tools to help improve a business's digital marketing efforts. This can include advanced analytics software, testing tools, and automation tools.

5. Measurable results: Digital marketing agencies are focused on delivering measurable results for their clients, such as increased website traffic, higher conversion rates, and better ROI. They use data and analytics to track and measure the success of their campaigns and make data-driven decisions to improve performance.

6. Scalability: Digital marketing agencies have the resources and expertise to scale a business's marketing efforts as needed, allowing the business to grow and reach new audiences.

Overall, working with a digital marketing agency can help a business achieve better results from their digital marketing efforts, save time and resources, and stay ahead of the competition.