To avoid recreating the same styles and title, summary pages over and over again one wants to create a template file. These are called <name>.dot where dot means document template.

To create a .dot just create a regular .doc file and then when saving it, change the extension to .dot. Nothing complicated here.

Now, if you are with a large company, the template file would be saved in a folder where Microsoft Office can find it automatically so when you say New you can then choose your template, it has to be placed here:

    C:\Users\<name>\AppData\Roaming\Microsoft\Templates

Instead of Roaming, you may want to go in another folder such as Local. It will depend on whether you're at work or at home and you have access to the full network.