Kaggle, the Google-acquired data science platform, started as a virtual meeting point for machine-learning geeks to compete on predictive accuracy scores. It evolved into a Swiss Army knife for data science and analytics—one that can help data professionals, including data-driven marketers, elevate their analytics game. Despite being a free service, Kaggle can help address an increasing number of data challenges: How to find reliable data sources to enrich existing customer and marketing data; How to find ideas, inspiration, and relevant…