Yes, screens are getting smaller. And yes, an ever-expanding percentage of email is being consumed on mobile devices. Understood. But all that said, readers are entirely accustomed to scrolling and will appreciate a tidy and uncluttered look. Use headers, bulleted lists where appropriate, captions, and any other tactics to help go easy on the eyes and communicate effectively with the skimmer.
CTR is the number of clicks on your CTA button, versus the total visitors to that landing page or ad. If 1000 people visit your landing page/view your ad, and 650 people click on the CTA, your CTR is 65%. A high CTR depends on a number of factors, chief among which are the value proposition on your page/ad, your CTA’s placement, and the relevance of your content vis-à-vis your target audience.
Over time, the popularity of email marketing campaigns resulted in personal email inboxes that were overflowing with the latest and greatest offers. Email campaigns grew and people grew tired of them. Laws that allowed customers to unsubscribe breathed new life into email marketing campaigns as customers could easily pick and choose the companies they were interested in.
Coupon: Unlike the job application, you probably know very little about someone who has stumbled upon one of your online coupons. But if they find the coupon valuable enough, they may be willing to provide their name and email address in exchange for it. Although it's not a lot of information, it's enough for a business to know that someone has interest in their company.
Don't use CTAs to drive people to your homepage, for instance. Even if your CTA is about your brand or product (and perhaps not an offer like a download), you should still be sending them to a targeted landing page that's relevant to what they are looking for and includes an opt-in form. If you have the opportunity to use a CTA, send them to a page that will convert them into a lead.