Select long tail keyword that have low competition and high searching.

By using keyword planner tool, you can choose keywords. Choose that keywords which have low compititon and high traffic.

High searches and low competition keyword are select.

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use adwords while choosing keywords. it is very useful tool for keyword suggestion

Choose keyword
 

Selecting keyword are the great task for any SEO. Because your SEO is totally depends on keywords. If their would right selection of keywords definitely you would get genuine traffic. Make sure before targeting the keyword you would have closer look on keywords search and competition. Less the competition searches should be high.

You have to use Google Ad words Tools it is helpful in selecting a keywords according to the traffic.

For choosing good keywords you can use the following tips:
--Using the Google Keyword Selection Tool.
--Using Long Tail Keywords.
--Too Much Competition or Not Enough Search.
--Less competitive and high search volume keywords.
Etc.

Choose your keywords based on your competitor sites and it should be high traffic and low competitive

Nice answers provided here and thanks for this postings