What is Adult Content as per Policy of Google for Adsense

Google AdSense has strict policy about adult content and do not allowed Adsense publishers to use Google Adsense on websites or blogs having adult content which are not family safe and Google advice publishers to be keep the content FAMILY SAFE. Google teaches us that do not use adult terms in your content even not using of any adult picture in our content. Many Adsense publishers are using widgets for generating traffic for their website or blog using it from MGID or 2Leep where they do not have full control over their content.