Google keeps on updating its algorithm every now & then for better user experience; hence one needs to keep his SEO strategy implementation at its best. SEO is an ongoing process as your competitors always try hard to fetch your place on the ranking table, hence executing SEO for a particular time period is never a promising idea. On the other way round, one cannot expect that he/she will invest once & rule the 1st place in search engines for life-time. Nothing is permanent,