Standard Library is an all-in-one API development, management and hosting solution that lets you build integrations — Slack apps, Stripe webhooks, you name it — in minutes instead of days. Perfect for cross-functional teams, always powered by code.
When you develop slack bot, you need to use stdlib.com as API provider.
So, your slack bot functionalities are implemented on stdlib.com and it works as API. Your slack bot will call this API and get results, display on slack channel.
The best slack bot development guide: https://medium.com/slack-developer-blog/build-a-serverless-slack-bot-in-9-minutes-with-node-js-and-stdlib-b993cfa15358