It is important you spread all that real ‘PageRank’ – or link equity – to your sales keyword / phrase rich sales pages, and as much remains to the rest of the site pages, so Google does not ‘demote’ pages into oblivion – or ‘supplemental results’ as we old timers knew them back in the day. Again – this is slightly old school – but it gets me by, even today.
Hi Kai! Using synonyms now and then is a great idea. It definitely makes your copy more natural and pleasant to read. And Google will comprehend that you’re talking about the same topic. You might want to use the keyword you’d like to rank for a bit more often than just once or twice, but don’t fret to use synonyms now and then. We’re not able to detect them with our tool yet, though.