I like to use simple analogies with business owners...
Right now it's like you are a store hidden in the corner of a strip mall and hardly anyone driving by on the street can even see you exist.
Getting you on the 1st page of Google is like putting a big sign or billboard right on the street where the majority of traffic is. Therefore more people will know your business is there.
BUT Google is even better than my analogy. Because all that traffic driving by on the street is unqualified - we don't know how many of them are looking for your type of product or service.
When you are on 1st page of Google for "their KW here" that's totally targeted traffic that is already looking for your service.
If you are not there, you are like the store back in the corner. One thing I can guarantee is you have zero chance of getting their business if no one knows you are there. But one of your competitors will if they are more visible.
So I can assure you, you'll get more exposure and traffic - but I can't make them pick up the phone and call you.
Like with the store example - my billboard can get them to your door, but whether they buy depends on what they see when they get inside. Clean, organized, attractive, specials, helpful info, right price? Are you giving them what they need and making it easy for them to buy?
Same with your website. I'll get them to your door, but it's up to your site to convert them to a call and then up to the person answering to convert that call to an appointment or sale.
Soooo..... that's why I can't honestly quantify return. I don't control your site or pricing or answer your phone. But it's always a numbers game - so in theory if I get more people to your door, more should turn into customers.
Adjust example to fit client. Example 2: Right now you are a Dentist buried on 3rd floor of medical building and no one driving by knows you are here. Getting on Google would be sort of like giving you a new office right next to CVS Pharmacy. All that traffic are interested in health and they all have teeth. ;-)
OK so that turned out kinda long and rambling, but I just let the words flow cuz maybe part that I thought I should censor and cut back on for brevity would help in certain situations so I just let it flow in my own wordy kind of way. So cut down and condense to fit the client.
Now you all know why I have carpal pain and no time. I can't answer a simple question with a simple answer.
<meta property="og:type" content="article"><meta property="og:title" content=""><meta property="og:description" content="When you meet with prospects and they ask about the return they'll see from your local SEO efforts, what do you say?">
<meta property="og:image" content="http://marketing-blog.catalystemarketing.com/wp-content/uploads/2013/10/LocalSEO.jpg">