Contact records in Nimble enable you to keep track of important details about your contacts such as email communication, addresses, phone numbers, notes, and other activities. So you are seeing what's most important to you when you first visit the contact record, you can edit and rearrange the widgets.
To do this, just click the ellipsis icon and choose "Reorder and Edit Left Panel Widgets". You can now drag and drop the widgets or even hide them.
When you are ready, click "Close" to save your changes.
You can also edit the field names and create new widgets from data fields. To do this, scroll to the bottom of the page where you'll see "Selected Fields".
From here, you can create, duplicate selected field widgets and even hide/delete the widget.