At the heart of WordPress's efficiency is its plethora of plugins made to enhance managing a website or blog. Among these, the 'Simple Post Notes' plugin stands out for its user-friendly and highly effective attributes. The plugin's purpose focuses on enabling users to include notes or comments directly within their posts or pages. These notes can provide essential contextual information or disruptive reminders, ultimately facilitating smooth website management.

You can think of 'Simple Post Notes' as a virtual sticky note system for your posts or pages. It creates an extra box in the right-hand side of your post editor, and there, you can pen your notes. For website administrators managing multiple contributors or sizable content volumes, it becomes an invaluable tool. The plugin provides a transparent way of giving instructions, suggestions, or adding necessary context that can be utilized by the team or referred back to at any stage.

'Simple Post Notes' plugin is not only limited to creating notes; it also adds an incredibly useful functionality of sorting your posts based on these notes. For example, if you had to review certain posts later or prioritize specific pages towards the top or bottom of your workflow, you simply add a note and then sort accordingly.

Another fascinating aspect about the 'Simple Post Notes' plugin lies in its compatibility. It seamlessly blends with WordPress' built-in system, making it knitted to the fabric of your WordPress site, hardly impacting your website’s performance or creating unwanted clashes with other plugins.

Moreover, this plugin's simplicity is key. One doesn't need any technical knowledge to operate it. You can install it and start adding notes to your posts or pages instantaneously, making it a perfect tool for beginners and seasoned WordPress users alike.