O que é Feed?

O termo "feed" vem do inglês "alimentar". Na web, o sistema é conhecido como "RSS Feeds". Na verdade, os feeds são usados da seguinte forma:

Toda vez que um usuário assina um feed, sempre que um novo conteúdo for publicado, ele pode ler o artigo ou a notícia imediatamente, sem a necessidade de acessar o site. Assim, ele pode, por exemplo, concentrar em um único leitor centenas de sites, e receber atualizações diariamente sem a necessidade de visitar um por um.

Existem diversos tipos de leitores RSS, off-line ou on-line. Dentre os on-line, os mais comuns são o Google Reader e o Bloglines.

Se você usa o Firefox não precisa usar leitor, pode também colocar os Feeds diretamente na barra de notícias. É só clicar sobre o Feed, e escolher "Inscrever agora", como na imagem abaixo:

Se o Feed for do FeedBurner, como no caso deste site, aparecerá uma janela diferente. Mas não se preocupe, clique em "View Feed Xml", como informado abaixo:

e depois em "Inscrever agora"

Utilizando como exemplo o joaoheliomj.blogspot.com, o feed ficará na barra do Firefox e os artigos estão disponíveis ao clicar sobre o Feed:

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