About.com是美国的一个入门网站，创立于1997年，部份内容为付费内容。它主要为网民提供各种各样的生活琐碎问题的解答。随着时间发展，它现时已发展成为一个包含500多个专题的超级指导网站。

它透过由特选的内容专家提供有偿的「指南」，从而形成一个又一个专题的网上社区。为方便管理这些社区页面，这些页面又会再组合成为一个一个的「频道」，如：家居维修、小儿科等。在这些网上社区中，用户得以分享他们的经验，而这些经验亦成为了每个网上社区页面的内容。而另一方面，作为网络社区领导者的专题专家，亦会从网上搜集其他文章、交互小测验等，以丰富网上社区网页的内容。

About.com, also known as The About Group (formerly About Inc.), is an Internet-based network of content that publishes articles and videos about various subjects on its "topic sites," of which there are nearly 1,000. The website competes with other online resource sites and encyclopedias and, for March 2014, 61,428,000 unique visitors were registered by comScore for About.com, making it the 16th-most-visited online property for that month. As of August 2012, About.com is the property of IAC, owner of Ask.com and numerous other online brands, and its revenue is generated by advertising.