Campaign Search Engines
You can create campaign search engine records for the search engines from which you buy keywords.
When you create a campaign record for a keyword, you can select the search engine on the Keyword subtab. You can also customize campaign reports to include information about search engines. The Search Engine Name field is a part of the Lead Source component. For more information, see Report Customization.
To create a record of a search engine, go to Setup > Marketing > Campaign Management > Search Engines > New.