If you guessed email B, you're right. Email A throws a 30% off discount directly in your face, but doesn't explain the value behind it. What does 30% off a GoDaddy product do for my goals? Will it let me adjust a small business' expenditures on infrastructure costs, freeing up money for a new hire? That benefit is far more tangible than 30% off an undisclosed cost.


Content creators should use bold text sparingly to emphasize particularly important words and phrases. If overused, it loses its effect, and the user will stop paying attention to your bolding as they scan the page. Perhaps elaborating on when and how to use bolding would be helpful. I would extend the same argument for highlighted text. And in this case, depending on how you use it and why, it may be exclusionary to your users who are colour blind if the colour is meant to convey meaning.
Now, if you're just sitting down to write an effective sales letter, you're probably wondering what some of the best copywriting tips might be for getting the point across and clinching the sale. While there are hundreds of potential tips, there are only about 15 that matter the most. However, these tips don't come from me. I've garnered them from two legends in the copywriting game.
"Ideation" is a marketing industry buzzword that describes the creative process of finding a subject, title and angle to write about; and ideation begins with analytics. Most ideation is done in a team setting, but freelance writers are usually on their own. Which is why it's helpful to know how professional marketing teams generate ideas. Before doing that, successful content writers need to: 
People come to your website with a specific task in mind. When developing your site’s content, keep your users’ tasks in mind and write to ensure you are helping them accomplish those tasks.  If your website doesn’t help them complete that task, they’ll leave. Conduct market research, perform a task analysis and other types of user research, and analyze metrics to better understand what users are looking to accomplish.
To explain how content marketing works, we first have to agree on a definition. Unfortunately, I might've sent myself on a fool's errand -- I went through dozens of different iterations of a content marketing definition (including the somewhat flippant "content marketing is using content for marketing") and found none of them totally satisfactory. But I hate to let perfection get in the way of progress, so let's just get something down on paper so we have a basis for discussion:
Really, there’s no right or wrong answer as to which type of writing contract you should pursue.  I’ve worked in every possible combination from part-time freelancing on the side to full-time freelancing to full-time remote work for a single employer.  Most people will find it easiest to start with a few small freelance projects, which will get their feet wet enough to figure out which course of action to pursue.
The proxy for content marketing in the following charts is "Attract", since content marketing is the top-of-the-funnel activity that attracts people to your business. "Convert" and "Close" refer to middle-of-the-funnel and bottom-of-the-funnel marketing activities, like email marketing, nurturing, sales enablement, marketing ops, conversion rate optimization, etc.
That interest is garnered almost wholly on the subject line of the email (with the sender name playing a role, as well). We've written a few blog posts about crafting email subject lines, including one on the anatomy of a great subject line and one showing 18 examples of awesome subject lines from brands. Here's a distillation of what you need to know to write some excellent copy.

Today, 41% of B2B marketers focus on content tied to the buying journey of a customer, yet many businesses fail to produce personalized content dedicated to each stage of the buying cycle. Personalized messaging doesn’t just mean targeting by demographic or filmographic criteria, it means proactively producing content that is suitable for each stage of the buyer’s journey. Eighty-five percent of consumers trust solutions that take the time to walk them through various paths toward decisions rather than just attempting to make that choice for them. This type of content shows consumers that you acknowledge and value their ability to evaluate and make decisions for themselves. 
When businesses pursue content marketing, the main focus should be the needs of the prospect or customer. Once a business has identified the customer's need, information can be presented in a variety of formats, including news, video, white papers, e-books, infographics, email newsletters, case studies, podcasts, how-to guides, question and answer articles, photos, blogs, etc.[5] Most of these formats belong to the digital channel.
At this stage of growth, it's also time to assign dedicated leadership to your content marketing team -- unless you want two dozen people reporting to the CMO. Many organizations hire a Director of Content, VP of Content, Chief Content Officer, or Editor-in-Chief to lead the entire content marketing team. This individual sets the vision for the team, secures budget, hires the right talent, contributes content ideas, solves for growth, and helps coordinate with other leaders across the marketing organization so content marketing doesn't become too siloed.
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