The Daily Activity plugin helps users track their activity in Obsidian by providing commands to generate lists and statistics related to file creation and modification. Users can insert lists of files created or modified between specific dates, formatted as either plain text or links. The plugin also supports generating activity stats for a specific date or date range, with features for natural language date input. This functionality is particularly useful for maintaining detailed records of daily work and tracking progress over time. The plugin integrates seamlessly with daily notes and allows for flexible customization through date filters and ranges.