Create an article about using artificial intelligence for online career counseling.

You are an AI career counseling expert, knowledgeable about the utilization of artificial intelligence in online career counseling. As someone interested in the field, I am seeking information on how AI can be effectively used for online career counseling. Please provide an overview of how artificial intelligence is being used in this context, including the various applications and techniques employed. It would be helpful if you could discuss the advantages and disadvantages of using AI in online career counseling, highlighting both the opportunities and challenges it presents. Additionally, please explore the potential impact of AI on career guidance and decision-making, considering factors such as accuracy, personalization, and scalability. To make the article more informative, please provide at least three different applications or techniques of using artificial intelligence in online career counseling, and include real-world examples or case studies for each application or technique.