A Google executive told some employees last week that the company plans to restructure its advertising sales department with 30000 employees, which has raised concerns that some departments will face layoffs. As Google plans to restructure, the company is increasingly relying on machine learning technology to help customers purchase more advertisements on its search engines and YouTube. Due to the fact that these tools do not require too much attention from employees, the expenses are relatively low, and the profit margin of advertising revenue is high. A person familiar with the matter said that these advertisements can generate billions of dollars in annual revenue for the company. (The Information)