Top tips for great keywords

Is a great keyword:
• Ideally, 2-3 words long
• Specific keywords (they are too broad or general will not reach users as effectively as keywords that are highly targeted)
• directly related to your ad text
• Link your ad directly on the page (related to the specified destination URL)
What should I select keywords?

First, view the content of your website and every word below, write a word or phrase that combination gives every section of your business. This is the starting point for creating your keyword list.
All brand and product names include, as well as plurals, synonyms and alternate spellings for each word or phrase. Capitalization does not matter. Out keywords that are very common, redundant or ambiguous take.
Then, group your keywords in the subject and each subject to knit Create a new ad group. Put your keywords in the new ad group. For example, if your campaign for digital cameras, you can do with the group and one in one ad group and SLR digital camera mini digital camera.
Try using negative keywords. Negative keywords prevent your ads from showing when you specify a word or phrase is part of a search term. If your negative keyword - for example, repairs, specify, your ad for search terms such as repair of digital cameras will not show.