List of all default Triggers

Comment

This covers all the comment types. Use comment, pingback, trackback, another_comment_type instead of the {comment_type_slug}.

Trigger name	Trigger slug
Comment added	comment/{comment_type_slug}/added
Comment approved	comment/{comment_type_slug}/approved
Comment replied	comment/{comment_type_slug}/replied
Comment spammed	comment/{comment_type_slug}/spammed
Comment trashed	comment/{comment_type_slug}/trashed
Comment unapproved	comment/{comment_type_slug}/unapproved
Comment published	comment/{comment_type_slug}/published

Media

Trigger name	Trigger slug
Media added	media/added
Media trashed	media/trashed
Media updated	media/updated

Plugin

Trigger name	Trigger slug
Plugin activated	plugin/activated
Plugin deactivated	plugin/deactivated
Plugin installed	plugin/installed
Plugin removed	plugin/removed
Plugin updated	plugin/updated

Post

This covers all the custom post types, as well. Use post, page, product, another_post_type instead of the {post_type_slug}.

Trigger name	Trigger slug
Post added	post/{post_type_slug}/added
Post saved as a draft	post/{post_type_slug}/drafted
Post sent for review	post/{post_type_slug}/pending
Post published	post/{post_type_slug}/published
Post trashed	post/{post_type_slug}/trashed
Post updated	post/{post_type_slug}/updated
Post scheduled	post/{post_type_slug}/scheduled

Taxonomy

This covers all the taxonomies. Use category, post_tag, another_taxonomy instead of the {taxonomy_slug}.

Trigger name	Trigger slug
Taxonomy term created	taxonomny/{taxonomy_slug}/created
Taxonomy term deleted	taxonomny/{taxonomy_slug}/deleted
Taxonomy term updated	taxonomny/{taxonomy_slug}/updated

Theme

Trigger name	Trigger slug
Theme installed	theme/installed
Theme switched	theme/switched
Theme updated	theme/updated

User

Trigger name	Trigger slug
User deleted	user/deleted
User login	user/login
User login failed	user/login_failed
User logout	user/logout
User password changed	user/password_changed
User password reset request	user/password_reset_request
User profile updated	user/profile_updated
User role changed	user/role_changed

WordPress

Trigger name	Trigger slug
Available updates	wordpress/updates_available