The key factor that will primarily determine your method of website marketing is your ad budget. It is always a good idea to start with $5 to $10 per day. This is the basic budget most websites adhere to for PPC.
Cost-Per-Click or CPC is the fee you need to pay for a single keyword click. It is not homogeneous and the cost usually varies from industry to industry and keywords.
You need to check how competitive your SERPs are before you go with PPC. Simply enter your selected keywords into your Google External Keyword Research Tool and check the estimated competition level. Using this tool, you can also check the average number of advertisers currently bidding on your targeted keywords. The popularity of your SERPs will greatly determine the prices of the PPC services.