# gitbook-plugin-ad GitBook Plugin to add ads or other content on every page. ```js { "plugins": ["ad"], "pluginsConfig": { "ad": { "contentTop": "
Ads at the top of the page
", "contentBottom": "%3Cdiv%3EAds%20at%20the%20bottom%20of%20the%20page%3C/div%3E" } } } // note: contentBottom is escape('
Ads at the bottom of the page
') ``` In order to resolve `JSON` safety, the best parameters `contentTop` `contentBottom` are encoded using the `escape`. For example: https://github.com/zhaoda/webpack-handbook/blob/master/content/book.json Then run `gitbook install` to download and install the plugin.