Hi, Can some long time Adsense publisher give me a few guides? My question is, what is the line between what is considered keyword/tag optimization and spam? Example, is it okay to write keywords in the following order: toyota, car, toyota car, model, toyota model, toyota yaris, yaris, small car, city, car, city. Is that considered keyword spam? Or is not a problem for Adsense? Thanks!
Here is helpful tip for you. Try to use 5% keyword density. If you don't know what that is. It means using your keywords 5% of the article. If you really must use the keyword again, try using LSI keywords. They are keywords related to your keyword. You can find them by looking at the related searches and wonder wheel.
The keywords tags are ok, you can use up to 20 of them without being considered spam. I would personally never use more than 10. Also, it makes little sense to use very broad keywords like car or city. You might want to be specific. Also, the keywords that you list are not as important as what Google finds it (obviously because of the possible abuse!) so it really shouldn't matter very much.