Before selecting keyword, clear your intention or target regarding keyword selection.
1. Keyword should be relevant to your particular page and meaning full.
2. Keyword contain your Target or relevant keyword to your product or service
3. Select long tail keyword
4. Do not waste time on short tail and highest searches keywords.
5. Analyse competitors keywords.
6. Keyword should target your audience and location.
Use Google Keyword Planner and more Long tail keyword online tools.
Hope it will help you
Research on keywords.
The keyword should be a long tail, it contains targeted audience and location, your keyword should be meaningful with your targeted service, research on competitors keywords.
Use Google Keyword planner for keyword research.