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A portal is a website or service that offers a single point of entry to a variety of Internet services. The three defining characteristics of a portal are personalization, aggregation, and community. Personalization allows users to customize the portal based on their interests and preferences; aggregation refers to the ability to collect and deliver a variety of content from different sources; and community features like forums, chatrooms, and user profiles foster a sense of collaboration and connection between members.
While these three characteristics are essential for a portal, there is one that is not included: search engine optimization (SEO). SEO is a set of strategies and techniques used to increase organic visibility of a website or web page in search engine results. While it is important for a portal to have good SEO, it is not one of the three defining characteristics.
In conclusion, the three defining characteristics of a portal are personalization, aggregation, and community. While SEO is important for a portal’s success, it is not one of the three defining characteristics.