Sorry if my question might be considered as a silly question...
Suppose that I have 3 keywords like:
1. Lose weight
2. How to lose weight
3. How to lose weight Fast
Now If I am going to use all those keywords in one of my posts in my website to rank them in google. Do I have to use all those three keywords in the post? Or it is enough to use just the #3 keyword as it includes the keywords in #1 and 2?
Say you are going to use a keyword density of %1 in your post for those keywords, What do you do then?