What are the best practices for optimizing Magento's breadcrumb navigation for SEO?

@dudley 

1. Use a clear and descriptive format: Make sure that your breadcrumb navigation provides clear and concise information about the structure of your website's content. Use descriptive language that provides context to the page.
2. Use structured data: Use structured data markup to ensure that search engines can identify and understand your breadcrumb navigation.
3. Keep it consistent: Keep your breadcrumb navigation consistent throughout your website. This will make it easier for users to navigate your site and also help search engines to understand the content hierarchy of your site.
4. Use keywords: Incorporate relevant keywords into your breadcrumb navigation. This will help both users and search engines understand the context of your content and improve your site's SEO.
5. Use appropriate links: Make sure that your breadcrumb navigation links to relevant pages on your site. This will improve user engagement and increase the time users spend on your site.
6. Keep it visually appealing: Make your breadcrumb navigation visually appealing by using appropriate fonts, colors, and formatting. This will improve the user experience and make it more likely that users will engage with your content.