Navigating the European B2B landscape requires more than just a Go-To-Market plan; it demands total alignment with complex local and continental regulatory frameworks. This Knowledge Hub is designed as a definitive resource for B2B leaders, founders, and compliance officers entering the Spanish and EU markets. From mastering the technical screening criteria of the EU Taxonomy to navigating the licensing deadlocks of PSD2 and AEMPS, we provide the strategic clarity needed to bridge the gap between global innovation and institutional legitimacy.