Which is the best for Online Marketing SEO or PPC?

[zeus]

Search Marketing encompasses:

SEO: Earning traffic through unpaid or free listings
SEM: Buying traffic through paid search listings

Originally called "Search Engine Marketing" the shorter phrase “search marketing” is now often used as the umbrella term over SEO and SEM. The longer phrase "Search Engine Marketing" — or SEM — is now typically used to describe paid search activities.

SEO + PPC = SEM (Search Engine Marketing)

Good luck to you,

Although what you have said its right. But still OP hasn't asked for the summation.