There are no hard and fast rules about whether a CEO should have a pitch deck. One school of thought is that it's unnecessary for the initial stages but becomes important once an investor is involved or negotiations with strategic partners. Another school of thought is that the CEO should be able to articulate their idea in any situation - no matter how informal - at all times. Whichever way you think makes more sense for your business, keep in mind that if you do choose to create a pitch deck, you'll need to update it regularly, so it accurately reflects what your company did now rather than six months ago!