Client onboarding in banking is the process of welcoming new clients and setting them up to use financial services. It involves collecting personal and financial details, conducting KYC and AML checks, evaluating risk, and establishing accounts. Onboarding may also include explaining account features, online banking tools, and support services. In retail banking, it ensures customers can use everyday services quickly and securely. In corporate or investment banking, it often involves more detailed due diligence and tailored services. In all cases, onboarding is essential for trust, compliance, and long-term client relationships.