What is your biggest traffic source?

Hey peeps 👋 As we all know it's not enough to build a great product - it also has to reach as many relevant users as possible. What is the main source of traffic for your website/application and what can you recommend to others to prop up their traffic game? In my own experience search traffic and direct access has been the most sustainable, but social media, email newsletters and referrals sometimes resulted in surprising results. Let us know!