You can see each of the categories and their values on your sales pipeline, but you see a category called 'Not Specified' - what does that mean?
NOT SPECIFIED - This is a category that is created when you convert a lead to a prospect with an opportunity value.
While your lead is still a lead, the opportunity value is a ballpark figure, an estimate.
When that lead is converted to a prospect, that value should be made up of products or services that your organisation offers.
This means that upon conversion, you want to go to the prospect's profile > deals and add what they are interested in. You can also navigate to deals from the main menu.
Here you will see a deal with an opportunity value. Open the deal and add the relevant products and services that make up that opportunity value.