It is ture that, now internet marketing, web promotion. Only collecting backlings is not good from anywhere, put good backlinks from high pr authority domain will help you get best result.
If your are looking for very thought keyworks globally e.g. cloud computing,cloud servers, web hosting, term life insurance,automobile insurance etc.
If your are getting lots of backlinks you will surely be highlighted in Google eyes and you will be monitored by Google. and if your backlinks are not good in quality your PR will fall and you automatically traffic reduce.