Font-weight vs <strong> vs <b> [ SEO, Semantics ]

Question

Ok, I need some clarification here.

1) Is the only difference between <b> and <strong> tags are the fact that <strong> used for some browsers that don't support css-styling? Like accessibility browsers etc? If not, what the heck else is this needed, because otherwise I don't understand the meaning of "semantics" or the "meaning" to use the <strong> instead of <b>.

2) Is there a difference between the <b> or <strong> tags and font-weight:bold in terms of SEO?

The theoretical and practical sides are both interesting for this two above questions.

Thanks

Answer 1

They are the same regarding SEO, but its good to know what is the difference between them.

Matt Cutts from Google talked about this topic in 2006 and made another video about it, both are the same, on of them are used in the HTML and the other one is used inside the WYSIWYG editors.

You can use them both and all the browsers and search engines will understand them, and here is the video by Matt

https://www.youtube.com/watch?v=awto_wCeOJ4