Even if a long tail keyword won't bring as many visitors as one keyword would, the traffic those keywords will bring will be better, and more focused towards what you're selling.

The keywords must be present in the URL for a better ranking. You should consider not to add a keyword more than once.

It calculates the right number of times your keyword should appear mentioned in the text and makes sure you do not over-optimize.

It calculates the right number of times your keyword should appear mentioned in the text and makes sure you do not over-optimize

Checks if there are words in the whole text that appear way too many times

Your readers (who are not search engine bots) should find a clear text, with a rich vocabulary, that takes into account some basic rules of writing: such as having an introduction, a conclusion (in which you state the topic you're writing about). Also, you can improve their reading experience by avoiding repetitions.

The keywords need to appear in the title of the article

The optimum length for Title is between 10-75 chars on major search engines.

Since the Google Penguin Update, the title must be different from the domain name, or you might get banned soon.

The keyword must appear in the body of the article, at least once

Bolding your keywords will help search engines figure out what your content is about and what topic you cover. It's also useful for your Human readers to bold some of the most important ideas.

The keywords should be used in headings like H2, H3, H4. Try NOT to use them all, for it will seem to be a SEO abuse. You can use your H2 button from the editor to do this. It works like the Bold, Italic or Underline buttons.

Articles need to be optimized for human beings as well, so you should place an image at the begining of your article.

Add at least one image in your article. Now use your keyword in the description of the image. The Alternative Text field of the image.