Which Azure service provides best-practice recommendations for cost and performance?

Azure Advisor provides personalized recommendations to optimize your Azure deployments across five pillars: cost, security, reliability, operational excellence, and performance. It analyzes your resource configuration and usage telemetry to suggest improvements, such as identifying underutilized resources for cost savings or recommending high-availability configurations for reliability. Azure Monitor collects and analyzes telemetry data from your Azure resources, but it doesn't provide proactive best-practice recommendations like Advisor. Azure Policy helps enforce organizational standards and assess compliance, focusing on governance rather than optimization recommendations. Azure Blueprints define a repeatable set of Azure resources that implement and adhere to standards, primarily for deployment consistency and compliance, not ongoing optimization advice.