You won’t need to advertise your services too much since many of your clients will come via word-of-mouth referrals. And online businesses like this typically have low overhead.
You can do coaching to help others to improve the search engine rankings of traffic or you can help agencies to boost their revenue or you can simply start building an authority website around SEO topics to monetize your website in so many ways (ranging from affiliate marketing to selling SEO related products etc).

Rob is one of the rare few that successfully operates where the technology industry, business and entrepreneurship, and the law meet, making him an excellent resource for any company working at this unique intersection. As important, he wastes no time or words identifying the root cause of an issue and providing guidance that, without asking, takes the perspective of business, technology, and the law into account before ever being offered.
One of the best ways to increase sales on your e-commerce site is to upsell to customers who are already buying. Bold Commerce’s Upsell app integrates with your Shopify store to encourage people to add more items to their carts. The service includes plenty of features to offer customers the most enticing deals possible, raising the chances of making an upsell.