> For the complete documentation index, see [llms.txt](https://postman-v1.guides.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://postman-v1.guides.gov.sg/campaign-guide-general.md).

# Campaign Guide - General

- [How to send a campaign?](https://postman-v1.guides.gov.sg/campaign-guide-general/quick-start.md): This page will teach you how to use Postman.
- [Before You Start](https://postman-v1.guides.gov.sg/campaign-guide-general/quick-start/before-you-start.md): If you are an agency user, please read this before you use Postman to send your messages.
- [Demo Mode](https://postman-v1.guides.gov.sg/campaign-guide-general/quick-start/before-you-start/demo-mode.md): Try out different channels before investing time to procure and set up your credentials.