Good question, for most directories I use they ask for mobile number to send a message of verification, for the ones which phone you for verification inform the company before hand to tell their customer service people to be ready. I know the bigger the company the more tricky these things get you just have to find out what works best to answer the calls even if they give you a direct number to use.
Check out the average CPC for some top industries. These are the costs of one click. Mind you, that’s a click that is not guaranteed to convert a customer. With paid campaigns, you have to keep optimizing and testing the ad creative to lower your CPC and increase your CTR. You can imagine that it takes a massive budget to even set a paid campaign in motion. And it requires just as much to keep maintaining it.
So if you're in the local space and you're saying, "Gosh, Google has really taken away the ability for my website to get the clicks that it used to get from Google local searches," going into Google My Business and optimizing to provide information such that people who perform that query will be satisfied by Google's result, yes, they won't get to your website, but they will still come to your business, because you've optimized the content such that Google is showing, through Google My Business, such that those searchers want to engage with you. I think this sometimes gets lost in the SEO battle. We're trying so hard to earn the click to our site that we're forgetting that a lot of search experience ends right at the SERP itself, and we can optimize there too.
A good call to action has a clear message and action. It should move people in the direction of purchasing. On a blog post, a good CTA may point people to more in-depth content like an e-book. It can also point people to your products and services. However, the in-depth content is more effective. You can then pitch your product or service using the in-depth content.
Remember when you used to rely solely on search engines for traffic? Remember when you worked on SEO and lived and died by your placement in Google? Were you #1? Assured success. Well, okay, maybe not assured. Success only came if the keywords were relevant to your site users, but it was the only real roadmap to generating site traffic and revenue.