The Birthday-Tracker plugin is designed to help users keep track of birthdays of family and friends directly within Obsidian. By inputting a file containing names and birth dates, the plugin provides notifications for birthdays occurring on the current day. Additionally, it offers a Year View that displays all upcoming birthdays in a sortable format, with the ability to click on each name for more details. The plugin also allows for customization of date formatting and file location, providing an easy-to-use solution for managing important personal dates within Obsidian.