SEO:
SEO encompasses all the strategies and tactics that make your website as search engine friendly as possible. A well-implemented SEO strategy helps helps to rank your website higher for related queries
Whenever a user searches for a phrase in Google Search Engine, Google looks for the most relevant matching query and serves it as the top query.
SEO is:
1. Sustainable
2. Long Term Process
3. Comparatively cheap
PPC:
PPC stands for pay-per-click. It involves bidding on keywords that you want search engines to show at the top about organic results. The reason why it’s called pay per click is that every time someone clicks on the paid listing the advertising website has to pay a certain amount to search engines.
Which one is better for my campaign?
Ideally, SEO and PPC should both be integrated into your campaign to improve your overall result. But many times its not practically possible owing to budget constraints. If you have the budget with you and are looking for quicker results then you should go for PPC. But if you want cheaper and sustainable results in the long run then you should adopt SEO into your marketing strategy