Question

is SEO ever growing industry ??

Answer 1

SEO depends on the search engine you want to optimize for. 'Cause we don't know the exact processes behind search result weighting, we can only try to optimize. These processes are changing from time to time, and with each update we need to focus on different aspects (ok, the basics are here since the mid-90s but to finetune SEO we will have to stay tuned for ever). So we can say, that SEO will never die, although I'm convinced that search engines as we know it today won't be here for too long. A huge impact is missed for years and I think the next big thing in the Internet will be related to Search.