Best Source for Paid Traffic?
PPC is the best source but i dont suggest you because its temporary and proper free SEO is a permanent solution.
USE SEO( Free) to get Organic traffic. Quality and high conversion rate. But if you dont want it because SEO is so hard. you can try Google Adwords or facebook ads
Serplify Pro- Optomize your Onpage and Get Rank on Google
Bonus For Convertifire - Tool kit to auto feedback.
Follow top 5 paid traffic sources.
1. Google Adwords
2. Facebook Ads
3. Outbrain Amplify
4. LinkedIn Ads
5. Twitter Ads