Hi friends, I want know How to search that keywords who increase the rank and traffic to our site ?Please suggest me friends.
It really depends upon you. You need to chose such keyword(topic) which is interesting to you and which you believe you can rank for it. If the keyword has less competition, then it's a plus point for you as you can make the site in the top list of Search Engine without much effort.
Make a list of all the keywords you think people could search using search engines. Get more content by focus on chosen keywords
The most basic idea behind selecting the correc tkeyword is choosing keywords for which people are actually searching. It is important to think like your target audience and not to think like an expert or someone well versed in your profession.
Keywords research, analyzing and selection all these thing depends on the website that which product or service you are offering to the peoples. For example if you are offering Ebook to getting health and fitness then research the keyword on health, analyze them and select by their competition, local and global searches. Good luck.