People believe that SEO is dead
.But the fact is, there are sites which have high amount of visitors organically.
As per Google's algorithm a website must optimized to rank on SERP's. The challenge here is Google changes its algorithm oftenly. But the good news is, perfect SEO strategy and accurate content, can maintain and improve your position in the SERP.
In short, SEO with proper strategy can lead to more traffic, eventually convert the traffic into leads or customers.