Changes reports pages you have in browser local storage and offers several ways to manage them. github 
See Local Editing for typical personal usage.
See Submit Changes for bundled contributions.
Bundled changes are handled by servers configured to host a wiki farm and addressed with a DNS wildcard address. The server creates a new site for each submission.
Double-click the plugin to preview the JSON bundle.
See About Activity Plugin to review changes stored on servers in your neighborhood.