The Qiniu Image Uploader plugin allows users to upload images directly to Qiniu Cloud instead of saving them locally in their Obsidian vault. Users can configure their Qiniu Cloud bucket and set up required credentials, including AccessKey and AccessSecretKey, to integrate the plugin with their cloud storage. Additional optional settings like name prefixes and time formats provide flexibility in managing uploaded images. This tool is ideal for users who prefer cloud-based image storage to optimize local storage space within their notes.