If you are looking to add a metric and data directly into Visible you want to start in the "Metrics" section. From here, you will need to click the "+ New Metric" button in the top right corner as shown below:
After you click "+ New Metric" we will allow you to edit the settings for your new metric. You will be able to customize the following:
Categorize your metric
Add a description
Change the Unit & Format - Number, percent, currency, etc.
Change the Frequency - Daily, Weekly, Monthly, Quarterly, Annually
Click "Save" and you will be directed to a blank spreadsheet where you can enter in your data as shown below (you can enter the data in individual cells or copy & paste in any historical data):
Once you have your data entered in Visible - the metric will be ready to pull through and chart in both Dashboards and Updates.