---
schema_version: "1"
id: e4b527eaca777a1eca9c1af58fd96ec35fa567d716e63857953b08b75fd507a2
title: Create a Control Path with Random Send
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/mktg/264-0-0/mc_jb_einstein_sto_random_testing.md
canonical_url: https://help.salesforce.com/s/articleView?id=mktg.mc_jb_einstein_sto_random_testing.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 86da9978e2f0af37bb4bab40dd360a1b7c5887a56860a579db89148b49612aa5
description: Find out how Einstein Send Time Optimization (STO) performs when you compare the engagement rates of random sends to optimized sends. Use the Random Send option to send to some contacts at randomized times. To use Random Send, enable Einstein STO first.
products:
  - Marketing
  - Marketing Cloud Engagement
release: "264"
---
# Create a Control Path with Random Send

Find out how Einstein Send Time Optimization (STO) performs when you compare the engagement rates of random sends to optimized sends. Use the Random Send option to send to some contacts at randomized times. To use Random Send, enable Einstein STO first.

1. Drag the Einstein STO activity to a position directly before the message activity you want to optimize.
    
    ![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-mktg-mc_journeys_and_automations-264-0-0-production-enus/e08cdd71-c1c1-4ae5-a5e9-8a6dad583ad4/images/icon_note.png)
    
    Note The Einstein STO activity doesn’t support the SMS activity.
2. Click the activity.
3. After configuring the sending time frame, select **Randomize send times for contacts on this path**.