Creating a self-service Help Center is a good way to help customers resolve issues by browsing Knowledge articles and submit a case if they need more information. A self-service Help Center is an Experience Cloud site that provides customers with access to Knowledge articles, case management, and other features.
Customers can search for articles that answer their questions, rate and comment on articles, and create cases if they need further assistance. Verified References: Create a Self-Service Help Center

Explanation
These are two features that a consultant should recommend to help reduce the call wait time and improve customer service. Chat is a feature that allows customers to interact with agents in real time through a web-based chat window. Chat can help reduce the call volume and provide faster and more personalized service. Case Auto-Response is a feature that allows administrators to set up automatic email responses to customers who submit cases via email or web. Case Auto-Response can help acknowledge the receipt of the case, provide a case number, and set expectations for the resolution time. Verified References: :
https://help.salesforce.com/s/articleView?id=sf.live_agent_overview.htm&type=5 :
https://help.salesforce.com/s/articleView?id=sf.case_email_autoresponse.htm&type=5