I recently had an SEO consultant state that Google recommends, for SEO or “linkvalue” for a page, 100 links per page.
I have never seen the word “linkvalue” before so I decided to Google it, ironically and found nothing. After that I decided to Google about 100 links per page. I soon came across a post made by Matt Cutts (http://www.mattcutts.com/blog/how-many-links-per-page/) whereby he states:
The original reason we provided that recommendation is that Google used to index only about 100 kilobytes of a page. When we thought about how many links a page might reasonably have and still be under 100K, it seemed about right to recommend 100 links or so.
So the problem was that the Google bot would only read up to 100kb of data before potentially truncating a page. Of course, even back then this was just an advisory (this was back in 2009) and it was Google’s attempt to predict max page size for things.
Matt goes on to explain about the modern day tactics of the Google bot:
Does Google automatically consider a page spam if your page has over 100 links? No, not at all. The “100 links” recommendation is in the “Design and content” guidelines section
So you see, the whole 100 links per page thing is really only about design and in reality, as can be seen from this picturegram: http://www.nickbilton.com/98/ many of the top 98 sites on the web from back then had lots more than 100 links and still do.
However this being said Matt does go on to explain:
At any rate, you’re dividing the PageRank of that page between hundreds of links
So if you are really keen on passing as much of your pagerank to pages on your site that might not be able to hold their own (in which case you should probably question why you want them listed) and you have 600 odd links on one page then you probably want to cut down on the links a little otherwise it is completely up to the design of the site.