I'm a solopreneur, so I need a tool that's easy to manage and doesn't require constant babysitting. What should I look for?

As a solopreneur managing an e-commerce business, I'm overwhelmed by complex marketing tools that require constant attention. I need a solution that can help me increase conversions and manage promotions without consuming all my limited time. I'm looking for something that's intuitive, requires minimal setup, and can work intelligently in the background while I focus on growing my business and creating products. What features and characteristics should I prioritize in a marketing tool to ensure it truly supports a one-person operation?