Search Engine Restriction Factors
General restriction for search engines, step by step tutorial on the specifics off all the top search engines. Prevent website from being banned.

Keywords Spam
Nobody likes spam on the internet, including the search engines. Try not to repeat the same keywords numerous times in a row anywhere on your page and especially in your META tags. Repeat keywords 1-3 times in your META tags! If a search engine thinks you are spamming with too many repeated keywords, you can be banned from that particular search engine for life!

Search Engine Submissions
Avoid submitting too many of same website at the same time. If a site has a total of 50 pages want submitted and indexed for the search engines, don't submit them all at once on the same day! Play it safe, submit a maximum of 5-10 of your Web pages a day to all the search engines. Only submit the most important pages like home page and doorway pages.

Doorway Pages
Doorway pages are great and definitely spend some time in creating and designing them. But don't get carried away with designing a dozen doorway pages for the same exact keyword! The key is to design one or two pages targeting different keywords phrases. By the way, don't come up with every possible and conceivable keyword pertaining to a site, product or service. Choose the most targeted keywords, design doorway pages and submit. As a business grows and more contact with customers come up with other keywords. Then repeat the process of designing and submitting.

Choosing Keywords
List keywords in your META tags that only apply to a site, product or service. Some people abuse the voyeurism exercise by trying to see what keywords users are inputting in the search strings, a keyword that is in high demand. So they throw in some keywords in their META tags hoping to get some serious traffic to their site. What good is that going to do? Don't waste time targeting the wrong crowd using the wrong keywords.

Keywords Camouflage
One trick that worked a couple years ago, but definitely does NOT anymore is camouflaging a list of keywords on Web page to match the background color. It may still see this with some Web pages get to the bottom of a page and the entire bottom half is just blank space. No graphics, no words it looks simply like a bad design. But look at thier source code or run mouse cursor over that section while holding down the left-click button, keywords will appear.

This method will not work very well. Besides, no matter how small the fonts to be, the site will still look ridiculous with a huge gap at the bottom of the page! Search engine especially Google is smarter than anybody think, then learn more about keyword in Google!