When sending emails, many senders wish to add a personal touch by dynamically inserting the recipient name into the subject line or greeting.
In order to insert a recipient's first name in your emails, use the "Tags" section of the Single Send/Automations to grab the appropriate tagging. When you copy the Tag for first name, it initially includes a default placeholder (which is optional).
When you copy a tag from the Tags tab in the Marketing Campaigns editors, pasting the tag into your design will add a "default" automatically. The tag will look like the following example — the tag name followed by a pipe character and the word "default." You can think of the pipe as the word "or." This means the tag will be your recipient's first_name or the word "default."
{{ insert first_name 'default=default' }}.
Tags tab in the Marketing Campaigns editors
Below are some examples of handlebar tags that will allow this replacement function, and you can learn more about this in detail in these documents here:
Understand default values and Handlebars
Substitution Tags with the Design Editor
Notice: there's no need to use 'insert' if you're not using the default placeholder.