The term "widespread adoption" refers to the use and acceptance of a particular product, service or technology by a large number of people or organizations. It indicates that something has become popular enough to be used by many different groups, rather than just being limited to one specific demographic or industry. The phrase is often used in relation to new technologies such as smartphones, social media platforms and renewable energy sources, which have seen rapid growth and adoption over a short period of time. Widespread adoption suggests that the product or service has become an integral part of society and its use is now considered mainstream.