Authentic SEO Traffic Growth Campaign

My primary objective is a measurable lift in organic traffic. The site already went through basic on-page tweaks and an off-page link push, yet results have plateaued. I now need a deeper, data-driven... (Budget: ₹600 - ₹1500 INR, Jobs: Content Marketing, Content Strategy, Data Analysis, Google Analytics, Internet Marketing, Keyword Research, Link Building, Marketing, SEO, Website Optimization)