How you communicate is crucial to your success. In PUA, you need to be aware of how you communicate with other people so you can monitor your communication and tailor it for success in the environment you are in.
Generally, in PUA and in powerful communication, we want to sound confident and relaxed but decisive.
Because of the aforementioned, it is worth being aware of/monitoring one's use of 'uptalk', or questioning intonation. This is when you raise your voice at the end of a sentence when one is not actually asking a question.
See the recent BBC article on this.
Uptalk, whether one intends it or not, sounds like one is seeking agreement, consensus or approval. It is used a lot by girls and increasingly by girlie-men to seek approval, often without conscious awareness.
While it might have its uses to check if someone is being led successfully by you in a rapport building phase of a seduction, the negative associations of uptalk outweigh any benefits, as far as I am concerned. There are better, and more alpha ways of checking for rapport. I am writing as a language expert and seducer of some experience here though I admit rising intonation is something of a bugbear. The BBC article supports my intuition, though, that it has been more a feminine trait up to now.
In PUA (and powerful communication generally), to me, the negatives overwhelm any possible positive outcomes. In fact, I think most people don't know they are using rising intonation, never mind their ability to calculate its negative effects on their communication
It's a sign that you are being influenced by a culture without knowing or realising how that culture is feminising you. When I hear people making statements that sound like a question, I lose respect for them at two levels - one is their use of approval seeking and its unmasculine impact, intended or unintended. The other is at their lack of awareness of their communication.
Monitor your communication and whether you are using uptalk or not, consider your awareness of the impact of your communication. The ability to reflect on how your communication is received is key here.