What are semantic elements

Question

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Answer 1

Semantic descriptors divide site content into semantic blocks, it helps search engines to separate the most important from the secondary without using the <div> descriptor; their absence is not considered a gross error, but a good developer should use them.

Answer 2

before the introduction of semantic elements, pretty much everything was within a div. semantic elements such as header, footer, main, aside, article and section provide a clear sectioning of a web page.