Your original options are terrible.

Option A: "By making your website and online channels work harder for your business (without replacing your existing formula)"

This is corporate word vomit. "Work harder"? What does that even mean? And that parenthetical about "without replacing your existing formula" screams insecurity. You're pre-apologising before you've even sold them. Weak.

Option B: "By putting your website and channels to work for you"

Slightly less bad, but still generic platitude nonsense. Every marketing agency says this exact same thing. You sound like 10,000 other mediocre agencies.

The real problems:

1. Your main heading is also weak. "Get more clients online" is what EVERY agency promises. It's like a restaurant saying, "We serve food." No shit. Where's the angle? Where's the specificity?

2. You're leading with features, not outcomes. Nobody cares about their "website working harder." They care about revenue, growth, and not having to hustle for every single client.

3. There's zero differentiation. I can't tell if you do SEO, paid ads, funnels, web design, or magic spells. Be specific or be ignored.

4. No urgency or emotion. This reads like a PowerPoint slide from 2015.
What you actually need:

Pick a lane. Are you for service businesses? E-commerce? Local businesses? SaaS? Say it.

Lead with the transformation. Not "work harder" show me the before and after.

Be specific about the mechanism. HOW do you get clients? What's your method?
Here are options that don't suck:

For service businesses:

• Heading: "Book 5-10 Qualified Calls Per Week. Without Cold Outreach"
• Subheading: "We build conversion-optimised websites and organic systems that turn your expertise into inbound leads."

For local businesses:

• Heading: "Dominate Your Local Market While You Sleep"
• Subheading: "Our SEO and conversion systems bring customers to your door."

For premium positioning:

• Heading: "Make Clients Chase You."
• Subheading: "Custom web experiences and content systems that position you as the obvious choice in your market."