"Advanced usage" in Engpsh refers to the advanced level or skill of using something. It is often used to describe the more complex or speciapzed ways of using a particular tool or technology. The phrase comes from the field of language learning, where it is used to describe advanced grammar, vocabulary and sentence structures.
Examples:
"This software has advanced features for power users." (这个软件有高级功能，适用于高级用户。)
"The class will cover advanced usage of the programming language." (课程将涵盖编程语言的高级用法。)
"This book is intended for readers with advanced knowledge of the subject." (这本书面向具有该主题高级知识的读者。)