They both have their own importance in web world.

seo and ppc both are good,through ppc you can get instant results but seo is a long term process it will take time.
ppc is very expensive as compared to seo from both you will have results but the main difference is time.

Depend on the category of the websites like if you want to sell products and services in short period or seasonal then use PPC. If your services is going whole years then SEO.

SEO and PPC both are the good method to get traffic on website that help to generate more leads and business.

ppc is better then seo but the results for ppc is for short time until and unless if you are spending money then its better otherwise after some time you will see changes.

I think SEO

In my opinion SEO is Best technique.

SEO is best way...............