Email marketing. How email marketing plays an important role in improvisation?

Email marketing is the act of sending a commercial message, typically to a group of people, using email. In its broadest sense, every email sent to a potential or current customer could be considered email marketing. It usually involves using email to send advertisements, request business, or solicit sales or donations, and is meant to build loyalty, trust, or brand awareness.

It refers to sending email messages with the purpose of enhancing a merchant's relationship with current or previous customers, encouraging customer loyalty and repeat business, acquiring new customers .
Email marketing has evolved rapidly alongside the technological growth of the 21st century.
Email marketing can be carried out through different types of emails:
1.Transactional emails
2.Transactional emails are usually triggered based on a customer's action with a company.
3.Direct emails
Direct emails :
Direct email involves sending an email solely to communicate a promotional message (for example, a special offer or a product catalog). Companies usually collect a list of customer or prospect email addresses to send direct promotional messages to, or they rent a list of email addresses from service companies.
Mobile Email marketing :
Email marketing develops large amounts of traffic through smartphones and tablets. Marketers are researching ways to advertise to more users and to make them view advertising for longer.
Advantages
Email marketing is popular with companies for several reasons:
An exact return on investment can be tracked ("track to basket") and has proven to be high.
Email marketing is significantly cheaper and faster than traditional mail, mainly because of the high cost and time required in a traditional mail campaign.
Businesses and organizations who send a high volume of emails can use an ESP (email service provider) to gather information about the behavior of the recipients.
Email provides a cost-effective method to test different marketing content, including visual, creative, marketing copy, and multimedia assets. The data gathered by testing in the email channel can then be used across all channels of marketing campaigns, both print and digital.
Advertisers can reach substantial numbers of email subscribers who have opted in (i.e., consented) to receive the email.
Opt-in email advertising :
Opt-in email advertising, or permission marketing, is a method of advertising via email whereby the recipient of the advertisement has consented to receive it. It may involve hand shake protocol between sender and receiver.

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What is a website? What are it's types?

A website is a collection of related web pages, including multimedia content, typically identified with a common domain name, and published on at least one web server.

 It is accessible via a public Internet Protocol (IP) network, such as the Internet, or a private local area network (LAN), by referencing a uniform resource locator (URL) that identifies the site.
Websites can have many functions and can be used in various fashions; a website can be a personal website, a corporate website for a company, a government website, an organization website, etc.
Webpage:
 Webpage are the building blocks of websites.
The World Wide Web(www) was created in 1990 by British CERN phycisit Tim Berners Lee.
File Transfer Protocol and Gopher protocol were used to retrieve individual files from a server.
These protocols offer a simple directory structure which the user navigates and chooses files to download. Documents were most often presented as plain text files without formatting, or were encoded in word processor formats.
Static website :
A static website is one that has web pages stored on the server in the format that is sent to a client web browser. It is primarily coded in HTML and cascading style sheets (CSS)  to control the appearance of the website beyond the basic HTML.
Images are commonly used to effect the desired appearance of the browser.
Audio and video can also be considered as static.
Simple forms or marketing examples of websites, such as classic website, a five-page website or a brochure website are often static websites, because they present pre-defined, static information to the user.
Static website can be edited using four broad categories.
1. Text editor such as notepad or text edit.
2.WYSIWYG offline editor such as Microsoft Front page and Adobe Dreamweaver.
3.WYSIWYG online editor such as widgets, intro,  blogs.
4.Template based editor such as iweb.
Dynamic website :
A dynamic website is one that changes or customizes itself frequently and automatically.
A site can display the current state of a dialogue between users, monitor a changing situation, or provide information in some way personalized to the requirements of the individual user.
Multimedia and Interactive content:
A 2010-era trend in websites called "responsive design" has given the best of viewing experience as it provides with a device based layout for users. These websites change their layout according to the device or mobile platform thus giving a rich user experience.