Sales, ultimately, is about the numbers, isn't it? The job of selling or profit making can always be simply expressed in conversion ratios, and it should. Always. These are known as KPIs or Key Performance Indicators to make up the Sales Funnel.
What numbers, you ask? Well, OK, let's take a look.
What activities lead up to a sale? Let's take it from the bottom. With the end in mind, we end with the number of (d) sales. Preceded by the sale is a (c) presentation, proposal or quote to facilitate the decision to buy. Preceding this is the (b) appointment to determine and analyze needs. All this begins with the (a) initial contact to generate a lead.
Now, can you track other activities? Sure, but keep in mind, KISS.
And why is knowing your numbers important? Well, it's not that important unless you track it. Why track it? The only reason to track it is so that you can improve it.
And if you improve the quantities or conversion ratios, that means more profits and more money and that's important to somebody, isn't it?
The question is, what's important about more money to you?