There are few standards and there is also definitely some art to it. If you include too much detail, it's confusing and busy. If you include too little, it may

There are few standards and there is also definitely some art to it. If you include too much detail, it's confusing and busy. If you include too little, it may not convey anything useful. You should also really need to know your audience. Is it a potential investor, a B2B customer, or another engineer? All these may ask for "architecture diagrams" and mean something totally different.