A contact form should help a customer start a useful conversation, not collect every possible detail before anyone responds. Ask only for information that supports the next decision and provide a clear response expectation.
Test the form on a phone, with missing fields, long messages, network interruptions, and a successful submission. Show clear errors, protect submitted information, and make sure the business can see and follow up on the enquiry.
Review this topic from a visitor’s point of view as well as from a technical or SEO report. Confirm that the main answer appears early, the next action is clear, the page works on a normal phone, and important content is available in the initial HTML. Then use real enquiries, search questions, and support records to decide what to improve next.