I've heard ther are some words such as "guaranteed" that are not supposed to be on landing pages because google doesn't like them. Is there a list of these words? Also -- where can I find the BEST tips around for creating a perfect landing page that will get me great quality score off the bat... ??
Your landing page should give the user all that was promised them in your Google ad - for example if you quoted a certain price for your product then the landing page they come to should confirm that this is the price they will need to pay. Your landing page should be exactly what the user is looking for without the need for them to navigate deeper into the site to find what they want.
Im not aware of that regarding that word, as LauraBlackburn points out its about your landing page matching what your suggesting in the ad. Basically an ad saying one thing, then your landing page saying something completely different is not good.
All the above is correct, but you can include guaranteed on both your ad and landing page if that is what you are offering. The words you can't use within an ad are: "The best..." "The only..." "Number 1..." etc