Each Upsource user (yourself included) has a public profile with all the information about their activity across the projects:
a graph of the user's commit activity during the last 12 month
the user's recent activity, recorded in a news feed (events and discussions)
projects the user contributes to
the user's review activity
To open a profile of the user, click on that user's name anywhere in Upsource. You can access your own profile the same way, or click your userpic in the top-right corner and select Profile:
Your profile page can serve you as your homepage. You can open your commits, check and comment the changes, create issues and participate in reviews.
You can also enable the Out of office mode when going on vacation, etc. This will pause automated review assignments and email reminders.