1, search records: big data platform will be based on the user's search records, to recommend relevant content to the user, such as searching for "music learning", the platform will recommend relevant learning resources.

2. User behavior data: This includes records of user activities on social media, e-commerce platforms, and other big data application platforms, such as user likes, posts, and comments on a social media site.

The big data platform extracts and integrates data from various data sources, and then analyzes and processes it to provide users with more personalized services and recommendations.