Update README.md

Author: imsamthomas

README.md

@@ -32,11 +32,20 @@ To boost filtering experience for buyers, [Ajax Layered Navigation extension for
 
 Run the following command in Magento 2 root folder:
 
+With Marketing Automation (recommend):
+```
+composer require mageplaza/module-ajax-layered-navigation mageplaza/module-smtp
+php bin/magento setup:upgrade
+php bin/magento setup:static-content:deploy
+```
+
+Without Marketing Automation:
 ```
 composer require mageplaza/module-ajax-layered-navigation
 php bin/magento setup:upgrade
 php bin/magento setup:static-content:deploy
 ```
+
 ## 4. Ajax Layered Navigation highlight features
 ### Enhance UX by Ajax Technology