As a Guest user, your access to Workflows is limited to:
Launching a Workflow
Being assigned a task as part of a workflow
When you login to your account, you'll see a large [+] button in the middle of your Home page that says "Start new request" (under the heading "My requests").
Clicking this "Start new request" button will allow you to kickoff any of the Workflows you have access to in your account.
Admin users have the same access to Workflows on their Home page as Guests (see above), as well as an entire separate (admin-only) page titled "Workflows", where you can:
Launch a Workflow
See all existing Workflows (both Active and Completed)
Manage your Workflows
Edit existing Workflow templates
Create new Workflow templates
How to Access the Workflows page (admin users only)
Login to your Vendr account
Click on "Workflows" in the main menu on the left side of the screen
On the Workflows page, you'll see two tabs: Requests & Manage Workflows
Manage Workflows is where you'll go to create and edit Workflow Plans. For more on that, please see the Create & Edit a Workflow Plan help article.
On the Requests tab, you can See a list of all your Workflows (Active and Completed), plus key info:
"Title" - which Product the Workflow is associated with
"Current Step" - what step of the process each Workflow is at
"Assigned To" - which person in your company is assigned to that step
"Due Date" - when the Workflow needs to be completed