---
title: Introduction to campaigns
slug: campaign/docs/introduction-to-campaigns
docTags: 
createdAt: 2026-07-20T15:44:37.570Z
---

This section shows how to create, edit, or test campaigns and send out mailings through channels: email, letters, postcards, text messages and push messages.

- [Smart Campaigns](docId\:R5uUa03fN0LjqmSAh30Ol). Create, edit, and send one-shot campaigns.
- [Omnichannel campaigns](docId\:u4UGXkgb1_Mr8vKzWJtC7). Special notes for print, Web Push, Mobile Push and SMS.
- [Marketing Automation](docId\:rH-CVuXsKjRWjl4DSmNsl). Automate campaigns.
- [Transactional mails](docId\:o8JNgomieowXJr-ysCk5u). Set up and edit transactional mails.
- [Opt-in processes](docId\:brctgpxx40MYcdYlF58GH). Create and manage opt-in mailings.
- [Message templates](docId\:U4doAsilJp9v7hCuah63u). Create and edit message templates.
- [A/B test](docId\:I2CgCNjpTbPzeA9n98M3u). Set up and execute A/B tests.
- [Send time optimization](docId\:XIr3C-145mvfeCHVCFmt-). Deliver your message at the exact moment when recipients open their inbox and read their email.
- [Validate mailing prior to dispatch](docId\:yT-pgN77FS4KcWwOkw6H7). Information on the automatic parameter test before dispatch.
- [Send automatic notification after dispatch](docId:2J9HGwUDZh4_ysgJBqmIV). Information on automatic notification after dispatch.
- [Mailings Classic](https://support.optimizely.com/hc/en-us/articles/4413192262285). Information about the classic, one-shot campaign. (This feature is deprecated and replaced by functions of Smart Campaigns)