The document discusses Ancestry.com's use of data science and machine learning techniques to analyze their large collection of family history records and DNA data. Key points include: - Ancestry has over 30,000 historical record collections, 11 billion records, and DNA samples from over 120,000 users. - Machine learning is used for tasks like person search, record linkage, and suggesting record matches to help users build family trees. - Analysis of 45 million user-contributed family trees provides insights into historical immigration patterns to the US over centuries.