Google Adsense dis-approves a website based on there Quality manual review. So, if the Reviewer finds that your website is worth to serve Google Ads, he will approve you.

According to my personal experience, websites which are updated daily with unique and quality content + a bit unique daily hits have more chances of gettin approvals. Also, they don't allow gambling, etc. websites.

thanks,

FutureEXPERT

Google Riches & Google Money Master are Money Makers.