When you create a template in Dreamweaver, it will automatically create the doctitle and head editable regions.
you can manually add them by replacing the title tag in the template with:
<!-- TemplateBeginEditable name="doctitle" -->
<title>new name</title>
<!-- TemplateEndEditable -->
<!-- TemplateBeginEditable name="head" -->
<meta name="description" content="new description." />
<meta name="keywords" content="new keywords" />
<!-- TemplateEndEditable -->
make sure that your changes are being applied to the child pages, go to Modify -> Template -> Updates pages to force your changes to be applied after saving.