There are a couple ways to modify your website title tags. To modify your title tags, login to your admin section and do the following:
Click on the Website Content icon from your main menu.
Select the page you would like to edit from the Default Pages or Custom Pages drop down box.
You will see a Title Tag field.
Type in your title tag.
Click Save Changes.
The other way to do modify your title tags in quicker way:
Click on Navigation Menu from your main menu.
Click Edit Navigation Menu.
Click on View Title Tags.
This will show all your title tags for all of your pages.
Type in your title tags.
Click Save Changes.
For additional help in adding title tags and how to best use title tags on your website, please see our Search Engine Optimzation video tutorials in the HelpCenter from your website admin.