I'm here to help you understand the issue of data integration. I can unequivocally say that Data Integration is extremely important, why, you will find out here
https://www.oxagile.com/article/integrating-data-from-multiple-data-sources-qa-session-with-expert/. Data integration means combining and structuring the data or metadata associated with our data from multiple sources in order to aggregate the information in a way that we can effectively use it to solve specific problems and queries.