None of the is worth it! Blog commenting for Search engine optimisation is a comparatively quick and in many cases pleasant advertising and marketing system. Remain in good standing with your viewers by sticking to white hat procedures. Search engine optimisation is useful for blogging since it improves visibility, https://www.seobyaxy.com/blog/how-long-do-backlinks-take-to-show-up-in-search-engine-results/