It seems like you’re interested in Lighthouse for web development. Lighthouse is an open-source tool from Google that helps you improve the quality of web pages by auditing their performance, accessibility, best practices, SEO, and more. It’s a great tool for optimizing websites and ensuring they meet industry standards.

If you’re sending out emails with course information to a bulk audience and want to ensure they don’t end up in spam folders, make sure to follow best practices for email deliverability. This includes using a reputable email service provider, crafting relevant and engaging content, avoiding spammy language, and including an unsubscribe option.

If you have specific questions about using Lighthouse or email deliverability, feel free to ask!