To make the bot available from Microsoft Teams and from the company's internet website, you need to configure the channels for the bot. Power Virtual Agents uses channels to connect the bot to different communication platforms such as Microsoft Teams, Skype, Facebook, and more. By configuring the appropriate channels for the bot, you can make it available on those platforms and allow users to interact with the bot from those locations.
You can configure channels by going to the Power Virtual Agents portal, and then select the bot you want to configure. Then select the "Channels" tab, where you can add the channels which you want the bot to be available on.
Reference: https://docs.microsoft.com/en-us/power-virtual-agents/channels-overview

B). UpdateContext function can be used to create a variable that is only available to the current screen. This function takes in an object that defines the variable and its initial value, and updates the context of the current screen with that variable. Reference: https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps
/functions/function-updatecontext
C). Set function can be used to assign a value to a variable. The Set function sets a variable to a specified value, which is useful when you need to update the value of a variable. Reference: https://docs.microsoft.com
/en-us/powerapps/maker/canvas -apps/funct ions/function- set

Explanation:

Box 1: Load the extracted topic into a variable
Power Virtual Agents uses entities to understand and identify a specific type of information from a user ' s responses. When saving the identified information to a variable, a variable type will be associated with it. The variable type is analogous with the entity.
In Power Virtual Agents, a topic defines a how a bot conversation plays out.
A topic has trigger phrases - these are phrases, keywords, or questions that a user is likely to type that is related to a specific issue - and conversation nodes - these are what you use to define how a bot should respond and what it should do.
Box 2: Create a custom entity
The prebuilt entities cover commonly used information types, but on some occasions, such as when building a bot that serves a specific purpose, you ' ll need to teach the bot ' s language understanding model some domain-specific knowledge.
Reference:
https://docs.microsoft.com/en-us/power-virtual -a gents/advanced-entities-slot-filling