We're glad you asked about the tags used in our courses! Based on the HTML preview content, it appears that the main topic is likely related to "Oceanography" or more specifically, "Marine Science", given the presence of tags such as "Comet Classroom Home Meted Comet English (united States)", which suggests a focus on US-based courses.
Course tags are used to categorize and organize our online courses, making it easier for students to find the right content. In this case, we have several tags that indicate the main topic of each course: "Oceanography", "Marine Science", "Comet Classroom Home Meted Comet English (united States)", etc.
The use of tags in our courses provides valuable information for students, educators, and researchers alike. These tags help to ensure that course materials are relevant and accurate, reducing the risk of outdated or incorrect content. They also enable easy discovery and filtering of courses based on specific topics or keywords.