Online banner advertising began in the early 1990s as page owners sought additional revenue streams to support their content. Commercial online service Prodigy displayed banners at the bottom of the screen to promote Sears products. The first clickable web ad was sold by Global Network Navigator in 1993 to a Silicon Valley law firm.[16] In 1994, web banner advertising became mainstream when HotWired, the online component of Wired Magazine, sold banner ads to AT&T and other companies. The first AT&T ad on HotWired had a 44% click-through rate, and instead of directing clickers to AT&T's website, the ad linked to an online tour of seven of the world's most acclaimed art museums.[17][18]

Publishers can offer advertisers the ability to reach customizable and narrow market segments for targeted advertising. Online advertising may use geo-targeting to display relevant advertisements to the user's geography. Advertisers can customize each individual ad to a particular user based on the user's previous preferences.[27] Advertisers can also track whether a visitor has already seen a particular ad in order to reduce unwanted repetitious exposures and provide adequate time gaps between exposures.[72]

The publisher ad server then communicates with a supply-side platform server. The publisher is offering ad space for sale, so they are considered the supplier. The supply side platform also receives the user's identifying information, which it sends to a data management platform. At the data management platform, the user's identifying information is used to look up demographic information, previous purchases, and other information of interest to advertisers.
In the 2000s, with more and more Internet users and the birth of iPhone, customers started searching products and making decisions about their needs online first, instead of consulting a salesperson, which created a new problem for the marketing department of a company. In addition, a survey in 2000 in the United Kingdom found that most retailers had not registered their own domain address.[12]These problems made marketers find the digital ways for market development.

Consider sharing the focus of the email between the call to action you want from your user and offering them something like a discount, early access to a new product, or a free trial period for subscription-based services. Get creative here. Give serious thought to what your customers will find valuable. No one knows their needs better than you and don’t be scared to do some research into what they’d want.
Sponsored search (also called sponsored links, search ads, or paid search) allows advertisers to be included in the sponsored results of a search for selected keywords. Search ads are often sold via real-time auctions, where advertisers bid on keywords.[19]:118[53] In addition to setting a maximum price per keyword, bids may include time, language, geographical, and other constraints.[19]:118 Search engines originally sold listings in order of highest bids.[19]:119 Modern search engines rank sponsored listings based on a combination of bid price, expected click-through rate, keyword relevancy and site quality.[21]
The first part of the definition illustrates the range of access platforms and communications tools that form the online channels which e-marketers use to build and develop relationships with customers. The access platforms or hardware include PCs, mobile phones and interactive digital TV (IPTV) and these deliver content and enable interaction through different online communication tools such as organisation web sites, portals, search engines, blogs , e-mail, instant messaging and text messaging. Some also include traditional voice telephone as part of digital marketing.
This is a process described by Seth Godin known as permission marketing. The core concept of this idea is that you never market to someone that doesn’t want it, you first have to ask them for their permission. When someone signs up to your email not only do they become a warm lead but they give you their permission to send them offers and to market to them.
Craig Simpson, a direct marketing consultant, says that he works on hundreds of direct mail campaigns each year and finds the most successful campaigns are those coordinated with other media. For example, if a brand sends a piece of direct mail to a consumer, who then receives an e-mail and retargeted ads as parts of the same campaign, Simpson believes that those campaigns will have the best results. 
Because users have different operating systems, web browsers[84] and computer hardware (including mobile devices and different screen sizes), online ads may appear to users differently from how the advertiser intended, or the ads may not display properly at all. A 2012 comScore study revealed that, on average, 31% of ads were not "in-view" when rendered, meaning they never had an opportunity to be seen.[85] Rich media ads create even greater compatibility problems, as some developers may use competing (and exclusive) software to render the ads (see e.g. Comparison of HTML 5 and Flash).

If someone didn't ask to hear from you yet, it doesn't mean they won't want to hear from you later. It's your job to prove to them -- through helpful content and valuable offers -- that they should stay up to date with your company via email. If you force your email content on anyone too early, even if you know in your bones they're a great fit for your products or services, you risk preemptively losing their trust and their future business.

There are many vendors out there who sell lists or rent them (though renting means that the list seller maintains ownership and control of the email list). These are collections of email addresses that the vendors sell to any business or individual who can pay the fees. Your email list is considered to be a purchased or shared list if it’s provided to you by a third party, like an email list vendor or affiliate. There's a few ways that vendors build these non opt-in email lists.
Dimensional mail: Grab your potential customers' attention with mail pieces that are not the envelopes or postcards that people are used to getting but ones that have dimension, such as bulky items, boxes or tubes. These have a much higher response rate than the mail pieces you are sending now. Switching from your current format to a dimensional piece is very costly, so before considering doing this you need to know your budget. However, you can expect a lift in response. One of my favorite examples is sending a "message in a bottle" in the mail. This direct mail campaign featured a little plastic bottle with a label on it. Inside was a note on how to buy the company's product. Something like that stands out and gets opened.
A/B testing is trying two different techniques that communicate the same message on a small percentage of your list, seeing whether A or B performed the best, then using the better performing option when you email the rest of the list. It sounds complicated, but there are plenty of email marketing solutions out there that take all the math and guesswork out of it. (All you have to do is come up with the option A and option B you want to try.)
Launch Outlook and click the “New E-mail” button. Click the “To” button and, if necessary, choose an address book. From here, choose your blast recipients, which appear in alphabetical order. Press and hold down the “Ctrl” key, then click once on each person that you want to include in the group. If you’d rather do a blind blast -- where recipients can’t see each others' names -- add one name to the "To" field, then click the “Bcc” field and add the recipients here instead, then click the “OK.”

Influencer marketing: Important nodes are identified within related communities, known as influencers. This is becoming an important concept in digital targeting. It is possible to reach influencers via paid advertising, such as Facebook Advertising or Google Adwords campaigns, or through sophisticated sCRM (social customer relationship management) software, such as SAP C4C, Microsoft Dynamics, Sage CRM and Salesforce CRM. Many universities now focus, at Masters level, on engagement strategies for influencers.

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]