Formerly known as Azure AI Services or Azure Cognitive Services is a unified collection of prebuilt AI capabilities within the Microsoft Foundry platform
Attached relevant documents from official repo for your reference.
https://github.com/microsoft/semantic-kernel/tree/main/python/samples/getting_started_with_agents
https://pypi.org/project/semantic-kernel/
Please let me know if you have followed up queries on the same.
Thank you.