I increase sales for businesses using deep expertise across Meta, Google, AppLovin, and Pinterest. Using my 15+ years of experience and a genuine commitment to your success.
You don't need another agency that reports platform metrics back to you and calls it a win. You need someone who understands how paid media connects to margin, cash flow, and real business results and actually runs the accounts.
I work with a small number of clients at a time. That's intentional.
I'm Mark Peesel. BackLeft has been operating since 1997. I'm on every client engagement: strategy, account decisions, performance reviews, and your calls. There's no handoff to a junior team after you sign.
Lean operation on purpose. That keeps us sharp and keeps client work from becoming bureaucratic.
Full-service ad management for brands that want an experienced operator on their accounts without hiring a full agency or building an in-house team. I build, run, and optimize your campaigns with a focus on what the numbers mean for your business, not what the platform dashboard says.
Learn moreFor brands that already have someone running the ads but want a more experienced eye on the strategy. I work alongside your team or your existing agency to make sure the approach is sound and the right questions are being asked.
Learn moreAn independent, no-commitment review of your paid media accounts. Built for teams that want the truth before making a major decision. Written report, prioritized recommendations, live debrief call. Starts at $2,000.
Learn moreMost agencies optimize for platform metrics because that's what looks good on a report. I optimize for margin. There's a difference, and it shows up in outcomes.
Platform-reported ROAS is what the ad platform says it drove. Blended MER (total revenue divided by total ad spend) is what your business actually made. Every platform has an incentive to take as much credit as possible. I start with the P&L.
Scaling spend on a weak foundation accelerates the problem; it doesn't solve it. Before pushing harder, I verify the unit economics hold at scale. Most brands that plateau have a margin or structure problem, not a traffic problem.
I've managed paid media through every major platform shift: the rise of search advertising, the Facebook era, iOS 14, and the current AI-driven optimization landscape. That history isn't just tenure. It's knowing what a platform looks like when its reporting starts to drift from reality.
I keep a small number of clients on purpose. Running accounts well takes real attention, and attention has limits. When you hire BackLeft, you get me on your account: strategy, decisions, performance reviews, and direct access when you need it.
“I can't tell you what a breath of fresh air it is to have you starting this way. Every ads person I have worked with runs in and starts with ad and audience creation and wants to be up and testing new ads immediately. I also try to share data and past results but no one seems to care.”
Founder, women's online education brand
“I have struggled to find someone I can trust with my ads to actually let go. Mark is the first person I have worked with on ads that actually has me calm and sleeping at night. His knowledge in online advertising with Meta, Google and Pinterest is the best I have ever seen.”
CEO, digital education & productivity company
“Thank you for helping us have our best month ever in January. You were a huge part of it and continue to play an important role in helping us grow and scale. Appreciate your hard work and partnership.”
Co-Founder, women's apparel brand
Every engagement starts with a conversation. I want to understand your business before recommending anything. If it's not the right fit, I'll tell you that up front.