What is Azure Blob Storage?

Azure Blob Storage is Microsoft's object storage solution for the cloud, optimized for storing massive amounts of unstructured data like text and binary data. "Blob" stands for Binary Large OBject. Three types: Block Blobs: store text and binary data (images, documents, videos). Append Blobs: optimized for append operations — ideal for logging. Page Blobs: used for Azure VM disks (VHDs). Storage is organized in containers (like folders). Access tiers: Hot (frequently accessed data), Cool (infrequently accessed, lower storage cost), Cold, and Archive (rarely accessed, very low cost). Blobs are accessible via REST API, SDKs, and the Azure portal.