Each bullet point should consist of an intelligible phrase, rather than merely a word or two that is meaningless on its own or conversely a complete sentence that is better delivered orally. So, for instance, do use "Focus on profitable and growing markets" rather than simply "Focus" or "Markets" or "It is necessary to focus on those markets which are profitable and growing rather than those which are loss-making and declining". Consider this test: your slides should make sense and be useful to someone who was not present at your presentation.