I am doing SEO for my personal website since last 20 days while the website is a year and a half old domain, it still sometimes get absent completely from google search engine. I have analysed its complete on page activities and made required changes. Also I would like to add that recently the keywords I'am targeting was completely missing from the website and then I added them in the contents of the website 10 days ago. Meanwhile I am doing off page activities for it regularly. What do I do to make my site visible for my target keyword. Please suggest some fixes.