A bot is an app that users interact with in a conversational way, using text, graphics (such as cards or images), or speech. Every interaction between the user and the bot generates an activity. The Bot Framework Service, which is a component of the Azure Bot Service, sends information between the user’s bot-connected app (such as Facebook, Skype, etc. which we call the channel) and the bot. Each channel may include additional information in the activities they send.
For more information. Refer Microsoft Documentation.
Steps to Create Echo Bot:
Once templates are downloaded, you can see the 4 new bot project types are added.
Select Echo Bot from the project type and click next. Give the project name and create project.
Once the project get created, below is the structure shown in solution explorer.
Run the project using Cntrl + F5 or Click on Debug -> Run without debugging.
A default html page opens which shows the URL to connect your bot.
Open Emulator, click Open Bot.
Paste the URL and click connect.
Now you will be able to chat with bot locally.