Which of the following is not commonly used to schedule social media content?

Canva is primarily a graphic design tool that allows users to create visual content such as images, infographics, and social media posts. While it provides templates and features that help design posts suitable for various social media platforms, it does not primarily focus on scheduling content. Scheduling tools are specifically designed to allow marketers to plan, organize, and automate their posts across multiple platforms at predetermined times, which is the function served by Hootsuite, Buffer, and Sprout Social. These platforms enable users to manage their social media accounts and track engagement, making them essential tools for effective social media marketing scheduling. Therefore, Canva stands apart as an essential design resource rather than a scheduling tool.