is meta tags usefull? for you?

i read this opinnion in one of the seo sites, what do you think?

Do not use the meta keywords tag. Many people still think of this as a quick fix for SEO. It's not, It only benefits your competition!! how so? well back then search engines used to rely on Meta Keywords to guess which keywords were relevant to a webpage , now the search engines are sophisticated enought to examine the keywords in the body of a webpage.
by placing Meta Tags on a page your giving your competitor a list of important keywords.can then use these keywords and buy PPC ads or optimize their own site for your important keywords. Why give them this sort of business intelligence? Having invested time and money on exhaustive keyword research to identify the important keyword phrases to use for your own SEO and PPC efforts, why on earth would you make a list of your high value keywords public?

Hi

Meta Tags are very useful with the point of view of SERP and visitors as Meta description tells the visitor about what page is about they going to visit if they click to get in.

Thanks
Udit

The concept of meta tag is an essential but hardly ever recognized concept for individuals looking to get the most out of the world wide web for their company. It is one of the important thing of SEO.