Dialogflow is a cloud-based conversational platform, formerly known as API.AI. It enables developers to design, build, and deploy conversational agents, or chatbots, across various platforms, such as websites, messaging apps, and voice assistants. In order to understand and interpret human language, it uses natural language processing (NLP) and machine learning (ML) algorithms.

Here are some technical details of Google Dialogflow:

1. Natural Language Understanding (NLU): Dialogflow uses NLU to interpret user requests and intents. A branch of NLP known as Natural Language Understanding involves extracting meaning from human language. Dialogflow understands user requests using a variety of techniques, including entity recognition, intent detection, and context analysis.
2. Dialogflow uses machine learning techniques to increase the precision of its NLU capabilities. It improves its capacity to comprehend and react to user requests by using methods like supervised and unsupervised learning to train its models on massive amounts of data.
3. Agent Development: Dialogflow provides a web-based interface for developers to create and manage conversational agents. Developers can define intents, entities, and dialog flows, and specify responses to user requests using various rich response types such as text, images, and cards.
4. Integrations: Dialogflow provides integrations with various platforms such as Google Assistant, Facebook Messenger, Slack, and many others. This allows developers to deploy their conversational agents across multiple platforms and reach a wider audience.
5. Analytics: Dialogflow provides analytics and insights into the performance of conversational agents. Developers can track metrics such as user engagement, conversation flow, and user satisfaction to improve their conversational agents over time.
6. Security: Dialogflow provides a range of security features such as encryption of data in transit and at rest, access controls, and compliance with various security standards such as SOC 2, HIPAA, and GDPR.

Overall, Dialogflow is a powerful platform for building conversational agents that can understand and respond to human language. It uses advanced NLU and ML techniques, provides a rich development interface, and supports integrations with various platforms.