are long tail keywords still beneficial to one's site?
I believe long tail keyword still beneficial nowadays because long tail search optimization is a "must" in terms of increasing the ROI. Long tail keywords are not as competitive as those keywords that Web sites are usually optimized for, so they stand a better chance of ranking high and directing highly specialized traffic towards your site. Less competition in search engines means increased opportunities for you and your business. Usually, the conversion rate for long tail keywords is significantly higher than for other "main" keyword on your site.