SEO is the best because of we can more focus on this after posting also and we can change that content. we did't spend any money for this SEO so it is the better then PPC.
SEO is always preferred for the companies growth. We will be getting organic traffic with the help of SEO rather than SEM. But SEO is long term process and SEM is short term process.
search network with display select with all features.
by the using this campaign we reach only the genuine customers and we can post our add more effective with the using of related images for this add.
SEO is best. If you able to get rank in google then you will get free traffic. And for PPC you need to pay first.