Content piece engagement rate – If you have calls to action on multiple blog posts or other onsite content pieces, you’ll want to know which are sending the most converted customers through your funnel so that you can replicate your success by upgrading/updating that piece of content, sending paid traffic to that blog post, promoting it via email, and/or creating more content pieces like that. Tracking engagement rates on each CTA will give you this information (you can easily set up Google Analytics goals in order to see which posts drive more conversions).
To better understand the concept of a sales funnel and just how you can implement it in your own business, let's look at the following image from Shutterstock. On the left side of the image, you see a magnet. That magnet is attracting customers, which happens a number of ways. From blogging to social media to paid ads and everything in between, how the visitors arrive to your website has some impact on the success of your funnel.
The idea behind adding value to your website is that people who become daily users are much more likely to also become clients. If you don't sell a product yourself, you can become an affiliate marketer and post affiliate ads on your website. If you do sell a product, a daily user will have a chance to see more of your offers/products and buy them.
Principle of commitment & consistency -- When people commit to something, they're far more likely to purchase from you. That's why getting them to agree to something like a free + shipping offer or by agreeing with something you've said in some way. This is a powerful principle in sales and if you pay attention to some of the best marketers in the world, you'll notice that they work fervently to get your commitment to something, even if it's very small in the beginning.
Exits from stage. The exits from stage metric is very similar to your time in stage metric, but it allows you to see how many potential customers you are completely losing in a particular stage. For example, if your potential clients spend a year on your email list before they buy (but most of them do eventually buy), that’s a time in stage problem. If people spend 5 days on your email list before they buy, but 98% of them unsubscribe within 5 days, that’s an exits from stage problem.
Exits from stage – Similarly, seeing an excessively high number of people falling out of a particular stage is an indication that you aren’t doing enough to answer their questions or you’re asking them for too much of a commitment too early. Add more content to give them the information they need to move forward or make it easier for people to convert (e.g. don’t ask for a phone number when they’re downloading a certain e-book).
Much of this is steeped in buyer psychology. The best marketers in the world know that there is a psychological process that must occur for prospects to whip out those credit cards and turn into buyers or even hyper-active buyers. One such person whose perfected this process is Russell Brunson, an "underground entrepreneur" who founded a company called ClickFunnels, a sales funnel SaaS business that empowers marketers from around the world to build marketing automation without all the hassle.