Do Businesses Really Need a Digital Marketing Agency Today?

I was thinking about how businesses handle their online presence these days. Some try to manage everything themselves, while others work with a digital marketing agency.

I’ve seen names like Zoom Digital come up, but I’m not sure if it actually makes a big difference or if it depends more on the business itself.

Do you think hiring a digital marketing agency is necessary now, or can businesses still grow fine on their own using basic tools and strategies?

Would like to hear different opinions on this.