Take the email below from Paperless Post, for example. I love the header of this email: It provides a clear CTA that includes a sense of urgency. Then, the subheader asks a question that forces recipients to think to themselves, "Wait, when is Mother's Day again? Did I buy Mom a card?" Below this copy, the simple grid design is both easy to scan and quite visually appealing. Each card picture is a CTA in and of itself -- click on any one of them, and you'll be taken to a purchase page.
Alas, ESPs on shared IP addresses that don't require customers to use opt-in email lists typically suffer poor deliverability. Why? One customer's ill-gotten email address list can poison the deliverability of the other customers on that shared IP address. You're going to want to hitch your wagon to the light side of the email marketing force if you want your emails to actually get into inboxes.
Online advertising, also called online marketing or Internet advertising or web advertising, is a form of marketing and advertising which uses the Internet to deliver promotional marketing messages to consumers. Consumers view online advertising as an unwanted distraction with few benefits and have increasingly turned to ad blocking for a variety of reasons. When software is used to do the purchasing, it is known as programmatic advertising. 

The best time to send an email blast depends a little on the best time you think your recipients would like to receive it. Most business contacts receive an average of 75 emails per day. To make sure they have the time to review (and hopefully, read) your email, try to have your email blast arrive on Tuesday Mornings between 8am and 11am. Mondays (especially after holidays) is typically a day where most contacts are catching up on email from the weekend. Fridays are difficult, as most contacts are wrapping up work from the week and may not have the time to look at your message. Even if they do find time to read it, they may have forgotten about you, and your message, by the next Monday. If Monday is a holiday, time your email blast to arrive on a Wednesday Morning after the holiday. Mornings are best as most people are planning or finalizing their day in the mornings. This gives them more time to react to your email message that same day. Afternoons and evenings are typically too late in the workday to encourage immediate action.
Enhancing the Value of Mail: The Human Response, sponsored by the U.S. Post Office, used eye-movement tracking and biometric measurements such as heart rate and respiration to gauge attention and emotional engagement with both digital and direct mail. It then used magnetic resonance imaging to capture participants' brain activity when asked to recall a particular ad.
A text ad displays text-based hyperlinks. Text-based ads may display separately from a web page's primary content, or they can be embedded by hyperlinking individual words or phrases to advertiser's websites. Text ads may also be delivered through email marketing or text message marketing. Text-based ads often render faster than graphical ads and can be harder for ad-blocking software to block.[50]

Companies considering the use of an email marketing program must make sure that their program does not violate spam laws such as the United States' Controlling the Assault of Non-Solicited Pornography and Marketing Act (CAN-SPAM),[9] the European Privacy and Electronic Communications Regulations 2003, or their Internet service provider's acceptable use policy.
In our email marketing software review roundup, we test the top email marketing tools available based on how easy it is to create emails, build subscriber lists, set auto-responders, and pull in other communication-based tools, such as social media management and web analytics software. To that end, we selected Campaigner and MailChimp as the best pure-play email marketing services. If you need a more complex tool that can build comprehensive workflows designed to automate the email marketing process, then we recommend HubSpot and Pardot, which are better served as marketing automation tools.
Consumers also face malware risks, i.e. malvertising, when interacting with online advertising. Cisco's 2013 Annual Security Report revealed that clicking on ads was 182 times more likely to install a virus on a user's computer than surfing the Internet for porn.[105][106] For example, in August 2014 Yahoo's advertising network reportedly saw cases of infection of a variant of Cryptolocker ransomware.[107]
Did you know there are organizations dedicated to combating email spam? Thank goodness, right? They set up a little thing called a honeypot, which is a planted email address that, when harvested and emailed, identifies the sender as a spammer. Similarly, things called spam traps can be created to identify spammy activity; they're set up when an email address yields a hard bounce because it's old or no longer valid, but still receives consistent traffic. Fishy, eh?
If you sign up for something and the terms include words like "Sign up to receive updates from us and our partners that we think you'll like," your email address is likely being collected for a shared or sold list. A subset of this method is called co-registration. This is where you sign up at a website, but that website also automatically, or nearly automatically, signs you up for other sites. They try to legitimize this by informing you of the additional subscriptions, or providing boxes to uncheck. This is a situation where it's not the subscriber’s intention to sign up for the material they will be receiving.
Paid channel marketing is something you’ve probably come across in some form or another. Other names for this topic include Search Engine Marketing (SEM), online advertising, or pay-per-click (PPC) marketing. Very often, marketers use these terms interchangeably to describe the same concept — traffic purchased through online ads. Marketers frequently shy away from this technique because it costs money. This perspective will put you at a significant disadvantage. It’s not uncommon for companies to run PPC campaigns with uncapped budgets. Why? Because you should be generating an ROI anyway. This chapter walks through the basics of how.

An omni-channel approach not only benefits consumers but also benefits business bottom line: Research suggests that customers spend more than double when purchasing through an omni-channel retailer as opposed to a single-channel retailer, and are often more loyal. This could be due to the ease of purchase and the wider availability of products.[24] 
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