While ads can drive traffic and generate leads, email marketing should be your top priority. Building a strong email list with basic flows and pop-ups can bring a high return on investment (ROI) and lead to long-term success.   One of the major benefits of email marketing is its high return on investment (ROI). According to research, email marketing has an average ROI of 42:1, which means that for every $1 you spend on email marketing, you can expect to earn $42 in return.   Don't burn out your budget with ads and no email marketing. Before you run ads, make sure your email marketing is on the right track.