PPC
1. With PPC keywords, search volume is not as important as precision. Because you’re paying for each click, you don’t want to waste money on any old/irrelevant search terms.
2. Focus on keywords that will bring in buyers, not browsers. Eg. Someone searching for ‘laptop computer’ is less likely to be a buyer than someone who searches for ‘White MacBook Pro 17″ ’.
3. Remember that every keyword costs you money (CPC budget) so go over your keywords with a fine tooth comb, cutting out any that aren’t working and always keep an eye on the cost per click and the other on the Quality Score.
SEO
1. Have an understanding of the keywords that people search for and their intent with these keywords.
2. Target the relevant keywords with the highest search volume (‘relevant’ meaning appropriate to your audience/business/industry).
3. Refresh your keywords whenever you see fit to ensure you’re on top of any new advances, technologies, products or ideas that have become popular since you last did your research.