Given the requirements for quick iterations, speedy completion, and frequent updates, the Agile methodology is recommended. Agile allows for adaptive planning, evolutionary development, early delivery, and continuous improvement, facilitating rapid response to changes and ensuring close collaboration with the client for regular feedback and refinement.

Explanation
Interaction Log and Path for Cases are features that a consultant should integrate into the Service Console to assist agents with a standardized agent-customer dialog. Interaction Log is a component that allows agents to log notes and activities related to a record, such as calls, emails, tasks, or events. Agents can use the Interaction Log to capture important information from their conversations with customers and track their actions. Path for Cases is a feature that allows agents to see where they are in the process of resolving a case and what steps they need to take next. Path for Cases displays key fields and guidance for each stage of the case lifecycle, such as New, Working, Escalated, or Closed. Agents can use Path for Cases to follow a consistent and effective support process. Verified References: Service Cloud Consultant Certification Guide & Tips, Use the Interaction Log Component, Set Up Path for Cases

Embedded Chat Service is the feature that a consultant should recommend to meet the requirement of letting customers interact real-time with support agents from their computers and mobile devices. Embedded Chat Service is a feature that allows you to add a chat widget to any website or mobile app with a few lines of code.
Customers can initiate a chat session by clicking on the chat button or widget, and agents can respond using the Service Console. Embedded Chat Service also supports features such as pre-chat forms, chat transcripts, chat transfer, file transfer, and chatbot integration. Verified References: [Service Cloud Consultant Certification Guide & Tips], Embedded Chat Service Overview