Is strong and bold are same?

Answer 1

In HTML5 <strong> and <b> both exist and have a different meaning.

The <b> tag is for "offset text conventionally styled in bold". If you read deeper into the details you'll see it adds, "without conveying any extra emphasis or importance".

<strong> is different. It "represents a span of text with strong importance." There is semantic meaning of importance here. In fact, a <strong> tag within another <strong> tag has even more importance. There is nested importance. The html5 spec is enlightening on this.

Answer 2

When used alone, the output of both is same...