NovaEvelin - 9:34 am on Apr 24, 2013 (gmt 0) [edited by: tedster at 2:37 pm (utc) on Apr 27, 2013]
It is the percentage of times your keyword phrase appears on the page.
You can calculate it by using the formula
(Total Keywords / Total no. of words on the page) * 100
Make sure that your keyword is in the title tag, description tag and h1 tag at minimum. I will say that the percentage would be between 2 and 4%.
[edit reason] No signature links please [/edit]
[edited by: tedster at 2:37 pm (utc) on Apr 27, 2013]