Types of files
1. Index Templates
Index templates are the files which control the appearance and content of the index files in the blog, including the home page. We will deal with these files as they are the most commonly used ones. These include:
2. Archive-Related Templates
These control individual archive pages, for category-based, date-based, and individual entry based pages. These pages are much more functional than the Master Archive Index, if you want to modify the archive pages.
3. Miscellaneous Templates
These control various minor elements on the weblog site (and so you're less likely to be interested in them initially). These include: