MarketKing is a performance marketing agency that helps businesses generate measurable, scalable growth through data-driven strategy, analytics, and marketing automation. Serving more than 100 businesses across the United States, it works with organizations in home services and construction, medical care, yachting, franchising, and B2B SaaS. The agency’s services include SEO, Google Ads management, Facebook and Instagram advertising, campaigns on TikTok, LinkedIn, and Reddit, website design, email marketing, conversion rate optimization, and full-service marketing.

MarketKing connects advertising, landing pages, customer relationship management systems, and reporting to track how campaigns contribute to revenue. Its approach emphasizes high-intent lead generation, continuous campaign optimization, and automated follow-up, with ongoing creative testing to improve performance. The company also offers marketing audits, an AI-powered scan to identify gaps in funnels and lead generation, and strategy calls.

MarketKing was founded by Max Sereda, who previously built and sold a service company in Chicago. Drawing on that experience, the agency aims to help clients reduce wasted ad spend, improve lead quality, and make growth more predictable