The SEO's biggest drawbacks I believe that repeated the baseless assertion, and uncertainty, a lot of the called the SEOer in website post accurate to say that it is totally irresponsible. Make a pen party, such as website value update period, some website keyword ranking enhance certain sites keyword will fall, many SEOer will be thinking of is not to do what not to do the action that websites critical word decline. In fact, the crux of the problem lies elsewhere, but may be other factors affected.

As per me, it is just that seo doesn't have any fixed guidelines to follow and if it has it keeps on changing with every Google update.

seo is a very long term process and it's not a onetime process.we should always keep update.

SEOer must change their link building strategy according to the google algorithm updates to get the best results.