• %name% – the name of the group member receiving the SMS message.
• %posttitle% or  %post_title% – the title of the new or updated post.
• %postauthor% or %post_author% – the author of the new or updated post.
• %postlink% or  %post_link% – a URL to the new or updated post.
• %postexcerpt% – includes the first 20 words of a post into the SMS message
• %postid% or %post_id% – the WordPress post ID
• %post_date% – the publish date.
• %post_date_gmt% – the publish date in GMT
• %post_content% – the content of the post
• %post_status% – the status of the post, e.g. pending, published etc
• %comment_status% – indicates whether comments are permitted or not
• %post_name% or %post_slug% – the name of the post. Also known as the post slug.
• %post_modified% – date when the post was last modified.
• %post_modified_gmt% – modified date in GMT.
• %post_guid% – the unique identifier of this post.
• %post_shorturl% – returns the short URL for this post. If you are using Jetpack it will return the wp.me short URL.
• %post_feature_img% will insert the URL of the post’s featured image.

Also provided is a merge tag for custom fields. The format for this tag is

• %postmeta_<your custom field name>%. For example, if you have created a custom field called ‘name’, then you can include the value of this field into your SMS message, but using the merge tag %postmeta_name%

• %name% – the name of the group member receiving the SMS message.
• %posttitle% – the title of the post being commented on.
• %commauthor% – the name of the comment’s author.
• %commcomment% – the content of the comment.
• %commlink% – a URL to the new comment.