Unlike other computer languages, you do not compile the document yourself to create an executable.
Many people choose to use a program designed specifically for writing web pages.
Basically, the name of the program type explains what it does. Instead of seeing the HTML code on the screen as you design the web page, you see the page as it would print out on the screen or on paper. Knowing the basics of HTML before using such an editor allows you to determine which editors may be best for you. This manual is meant to be a guide. Use it to get you started, or refer to it when you need to find the tag for a certain function.