There are three types of workflow in share-point
1. List workflow 2. Reusable list workflow and 3. Site workflow.
and some of the following predefined workflow templates in SharePoint that address common business scenarios:
1. Collect Feedback (Route a document or item for feedback)
2. Approval (Route a document or item for approval or rejection)
3. Disposition Approval (manage document expiration and retention)
4. Collect Signatures (route a document, workbook, or form for digital signatures)
5. Three-state (Track an issue, project, or task through three states or phases)