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1) Analytics data is based on the UA code on the page. Assuming your pages are built on a template, by default the UA code for yyy.com is going to receive the visit, not yours. You could ask them to put your UA code on there but... that kind fo defeats the purpose of having analytics in the first place when you're blurring the data! 2) From a user perspective, it would be a little confusing to click a top nav link and end up on another website, so yeah I would suggest putting that link somewhere else on the site and making it clear that they're about to leave yours. Bonus points for using target="_blank" to open that other page in a new tab, also for user experience. **3) **Right again. If yyy.com has nothing to do with xxx.com (as in the owners of X and Y don't even know each other) then it's a very strange request and one I'd be hesitant to even entertain. The quality of their site can hurt you to a minor extent, I'd just be more worried about the confusing user experience and the fact that you'd be electively sending your users to their site, while they offer you... what? The reason they want that link up there is simply the implied strength of that location. Link value is typically seen in order of priority from top left to bottom right; a link in your top nav gives them a sitewide link from almost the very top of every page. Good for them I suppose, though sitewide links aren't great, but not something you should do.