Organic search optimisation has significantly changed over the last couple of years. Many SEO strategies and tactics which worked well before are no longer treated as acceptable and safe.
Competition has become increasingly intense with innovative approaches to gain search engine visibility. Optimising a website addressing all these changes has been a real challenge.
While following the basic SEO guidelines, on-page and off-page strategies are still important, a sustainable growth from organic search can only be achieved by following some strategies that go beyond the basics both from a technical and content standpoint.
Having a knowledge on basic SEO concepts and guidelines is important before you follow the above advanced strategies.