Practical strategy for real growth

I help companies figure out where their marketing is working, where it isn’t, and what to do about it. I bring together strategy, measurement, and execution to prioritize the right opportunities, improve marketing performance, and drive measurable growth.

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Why I Built Great Island Growth

Great Island Growth is built on a simple idea: data-driven marketing decisions start with clear measurement and ROI. I'm Lauren Lannan. I've spent more than 15 years working across finance, advertising technology, and SaaS marketing analytics, and I started this practice to bring that same rigor directly to the teams I work with. I lead every engagement personally, digging into your data and staying hands-on through execution, so your strategy actually gets implemented.

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Services

I help organizations turn marketing data into clear decisions and sustainable growth. My work sits at the intersection of digital marketing strategy and marketing measurement, ensuring your marketing investments drive real business outcomes.

  • Turn insights into a focused growth plan.

    The digital marketing landscape is complex and constantly evolving. I help organizations cut through the noise and build a clear, practical marketing strategy grounded in data and aligned with business goals. From search and social to broader brand channels, I work with teams to identify where to focus, how to allocate resources, and how to build a sustainable path for growth.

    This engagement may include

    • Customer acquisition funnel analysis

    • Channel strategy and prioritization based on budget and goals

    • Marketing budget allocation guidance

    • Experimentation and growth roadmap development

    Best for: Teams looking to scale marketing thoughtfully, improve efficiency, and ensure their marketing investments are driving real results.

  • Gain clarity on what’s actually driving results.

    Many organizations invest 10% or more of their revenue in marketing but lack confidence in their data. I conduct a comprehensive review of your marketing stack to ensure you can accurately track performance and make informed decisions.

    This engagement may include

    • Review of your marketing tech stack and tracking implementation

    • Audit of attribution models and data accuracy

    • Identification of gaps in measurement and reporting

    • Clear, prioritized recommendations to improve visibility into marketing performance

    Best for: Organizations unsure if their marketing spend is driving incremental revenue

  • Build a measurement framework that supports growth.

    Strong marketing begins with a strong measurement foundation. I help companies develop analytics frameworks that connect marketing activity directly to business outcomes.

    This engagement may include

    • Defining meaningful marketing KPIs

    • Designing attribution and measurement frameworks

    • Structuring or restructuring dashboards and reporting systems

    • Enabling teams to confidently interpret marketing performance

    Best for: Companies scaling their marketing efforts that need a clear view of what’s working.

  • Senior marketing analytics expertise without a full-time hire.

    For companies that need ongoing support, I’ll provide fractional leadership to help teams operationalize their marketing data and continuously improve performance.

    This engagement may include

    • Ongoing analytics and measurement guidance

    • Marketing performance analysis

    • Experimentation planning and evaluation

    • Alignment between marketing, leadership, and product teams

    Best for: Growing companies that need senior measurement expertise but aren’t ready for a full-time hire.

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Have Questions? Let's Talk

Have Questions? Let's Talk. Send me a quick note, and I'll get back to you within one business day.