URLs are sometimes appearing in text documents, spreadsheets, presentations (Google knows those stored in Google Docs).

有时网址还会出现在文本文档，表格和幻灯片里(Google知道这些都在Google Docs里面保存着)。

youdao

Google also features a line-up of cloud applications that make it a virtual one stop shop, and greatly enhances its brand, including Gmail, Google News, Google Docs and Spreadsheets, Google Chrome browser, Google reader, Froogle and the neat Google Earth.

FORBES: Google Gives You Technical And Fundamental Reasons To Own The Stock Now

Web ventures like Google Docs, Google Spreadsheets, Blogger and YouTube might not generate much revenue compared with Google's mammoth search business, but they're not mere side projects.

FORBES: When Google Grows Up

So with GoodData, you can create dashboards for many top apps like Marketo, Google Spreadsheets and Salesforce.com (NYSE:CRM).

FORBES: Andreessen Horowitz, Che Guevara And Changing the World