The theoretical significance of this music website is as follows:

1. Data analysis and research: Music websites contain a large amount of music information, including songs, singers, albums, rankings, etc. By crawling this data, various analyzes and research can be performed, such as analyzing popular music trends, popularity of singers and albums, user preferences, etc. These analysis results can provide reference for the music industry, music recommendation algorithms, etc., helping relevant practitioners make more informed decisions.

2. Music recommendation system: Music websites usually recommend similar or interesting music content based on user preferences and behaviors, and provide personalized music recommendation services. Crawling data from music websites can help build a more accurate and efficient music recommendation system. By analyzing the user's historical music listening records, favorite tags and other information, it can provide users with music recommendations that are more in line with their tastes and improve the user experience.