can anyone tell me buy traffic is healthy
 

can anyone tell me buy traffic is healthy for our website as Google point of view, and its safe for Google absence

No, Don't buy traffic. You just need to create unique content on daily basis.

Usually depend :) Of course if you can do SEO optimization is better. Easy way is to buy traffic to your site but from there it may come more problems, like if the traffic is not real human and target for your area.

Don't buy traffic instead acquire traffic naturally in SEO, PPC and SMO.

Yes, it is. Buy it should be quality traffic. In my opinion if you wanna buy then buy it from sites like SEOclerks.