Hey Carla,

I'm not entirely sure what you're saying with:

"one of the crawl reports is showing tons of 404's for the "smartphone" bot and with very recent crawl dates. If our website is responsive, and we do not have a mobile version of the website I do not understand why the desktop report version has tons of 404's and yet the smartphone does not. I think I am not understanding something conceptually."

You say that the smartphone bot is seeing tons of 404s and the desktop report is showing tons of 404s, but the smartphone does not. If you can clarify that, I can probably better answer your question.

However, the answer is likely that Google may decide not to crawl URLs that it has already identified as 404s in one context. That is to say if they identify URLs on the mobile device as 404s they will know not to crawl them if they encounter them on desktop and vice versa.

-Mike

Hey Mark,

In answer to your question, yes Google does see more value in body links than in navigation links. That is because they are pretty good at detecting what is the reoccurring code across the site. As Dave said the navigation itself is a question of usability, so build it in a such a way that users can easily get to the right pages quickly.

With the body links, however, it is about branding the other pages throughout the site for relevance. As you might imagine, it's a little harder to create relevance from just a list of links. Whereas if you have a paragraph of text surrounding a link you can programmatically identify context.

All that is to say, what you've read is right. There is more value in the body links for search engines due to context and there is more value for the user in the navigation due to user experience. Account for both, but don't go overboard with either.

-Mike

You should fill out a Change of Address in Webmaster Tools as well and then confirm that all of the old URLs are out of the index. The redirects however should remain in place as long as you have links pointing from the old site.