title says it all, what would happen if you only did onpage SEO so in essence, keywords, meta, description, header, LSI, etc No off-page SEO, which would mean no backlinks, no social bookmarking, youtube , facebook, article directory, etc It's basically white hat. do you guys think it would be good enough to rank well in google (maybe first page even), if you're site is about a niche (long tail keywords) another thing to include is that the content would be high quality and original. Do you guys think it can rank? how much does off-page SEO affect a ranking? 10%? 50? 90? thanks for all replies.