With offline marketing, it's very difficult to tell how people are interacting with your brand before they have an interaction with a salesperson or make a purchase. With digital marketing, you can identify trends and patterns in people's behavior before they've reached the final stage in their buyer's journey, meaning you can make more informed decisions about how to attract them to your website right at the top of the marketing funnel.
There are many entities that need Internet marketing, but only budget a small amount for the work. If you’re willing to volunteer or offer a discounted rate, you can find projects. Non-profit entities and political campaigns need marketing help, but don’t have much money budgeted for the work. These types of organization may present an opportunity for you.