The quickest way to type in words is not to use any capitalization. It makes no difference to the search engines that use the meta-tag keywords attribute whether or not you use commas or spaces to separate your keywords and keyword phrases. If it is easier for you to view your keyword phrases with commas, then use them. Using commas will not affect your web page's relevancy. However, if that misspelled word does not appear in your main body text, this strategy is a waste of time.
Search engines use both keyword frequency and keyword placement in their algorithms.
If you do not wish a search engine spider to index the content of a specific web page, then you can use the meta-tag robots exclusion attribute to accomplish this. They have indicated that you should use the robot.txt file. Many people mistakenly believe that they can instruct the search engine spiders to revisit their sites within a specified amount of time. In fact, we often recommend quizzing potential search engine optimization companies on the use of this meta-tag attribute. If they say that this tag works, don't hire them.