Which of the following is NOT a technical optimization that can be made in the HubSpot CMS?

Updating your social media profiles is not considered a technical optimization within the HubSpot CMS. This action primarily falls under social media management and branding rather than content management or technical adjustments.

In contrast, customizing your sitemap, adding links between topic cluster content, and enabling Google AMP are all specific actions that enhance the technical performance of your website. Customizing your sitemap improves how search engines navigate your site, while adding links between topic cluster content aids in establishing relevance and authority through internal linking strategy. Enabling Google AMP supports faster loading times for mobile users, contributing to an improved user experience and better search engine rankings. These actions directly relate to how the CMS functions and optimizes content for search engines and users, making them technical in nature.