When you right click on a property, you have the option to set a Dynamic Value to it. A popup will appear with buttons at the top which correspond to the groups of the available dynamic data. The website tab contains general data about the website, in the post you will find information about the wordpress post and in meta there are the most common meta data used in posts of the current post type. Selecting a dynamic placeholder to feed a property, will result in this property beeing populated with dynamic data from your database. Dynamic means that if for example you change the site description, every property on every schema that is using the { site_descr } placeholder will get the new value. It also means that the value can be different for different content. For example, the { post_title } placeholder in the headline property of the Posts Defaults form, makes the headline property of the auto-generated schema get each post’s title as a value.
