Saber se tiraram print e baixaram sua página/post offline, incluindo no post uma orientação para pesquisarem um termo específico nos buscadores da internet. Depois, é só verificar quantas buscas foram realizadas, caso o buscador disponibilize essa informação.
Assim, você consegue ter uma ideia de quão popular seu conteúdo está sendo preservado e compartilhado.
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To make your Web 2.0 post more durable, even without using permanent technology like blockchain, you can ask people to take a screenshot or save the content offline in their browser. To find out how many people did this, you can include instructions in your post for them to search for a specific term in internet search engines. Then, you can check how many searches were performed, if the search engine provides this information.
This way, you can get an idea of how popular your content is being preserved and shared.
If there are many searches, then most of society would know about it (supposedly).