Final answer:
Block Blobs are a form of cloud storage that consists of individually manageable blocks of data, optimized for storing large files efficiently. They differ from Append Blobs, which are better for logging, and Page Blobs, meant for frequent operations such as those needed for VHD files.
Step-by-step explanation:
Block Blobs are made up of blocks of data that can be managed individually. In cloud storage platforms such as Azure, block blobs are used to store text and binary data as a set of blocks, which can be managed separately for more efficient upload or download. Particularly, these blocks are ideal for storing large files like images or for streaming, as individual block management allows for easy modifications without affecting the entire blob. In contrast, Append Blobs are optimized for append operations, making them suitable for logging data from virtual machines. Page Blobs, on the other hand, are made up of pages of data and are designed for frequent read, write, and update operations, which makes them particularly useful for VHD (Virtual Hard Disk) files used in Azure virtual machines.