Marketers preparing an acquisition campaign often face the same question: which fields should I ask for on the landing form? The right selection reduces friction, improves completion rates and helps ensure the leads you receive match the campaign objective—whether it’s sign-ups, bookings or requests for more information.
This guide focuses on practical decisions you can make before launching an SMS or email-driven acquisition campaign and explains how to prioritise fields for both volume and quality.
Define the conversion promise and the single CTA
Start by clarifying the action you want from the user and make that the sole focus of the form. If the campaign offers a voucher, newsletter sign-up, trial booking or product demo, the form should collect only what’s needed to complete that specific request. Multiple CTAs or secondary asks increase cognitive load and reduce completion.
Practical rule: map every form field to one clear business use. If a field does not directly enable fulfilment of the promise or a measurable qualification, it should be removed or deferred.
Essential fields versus optional or conditional fields
For most B2C acquisition campaigns a short core set covers the operational needs of follow-up and segmentation. Below is a typical breakdown you can adapt depending on the offer and channel.
- Essential (default): first name, email address or mobile number (choose the channel used in the campaign), and explicit consent checkbox or visible opt-in line reflecting the offer.
- Conditional: postcode or city for local offers, preferred appointment date for bookings, or product-size/variant if selections are required to deliver the promise.
- Optional (defer to follow-up): phone number if email was captured, company name (B2C only when relevant), marketing preferences beyond the current campaign.
Example decisions: if you run an SMS-led voucher campaign, make the mobile number mandatory and the email optional. For a lead magnetdownload delivered by email, require email and treat mobile as optional. Avoid fields that request sensitive personal data or financial information at acquisition stage.
Design for mobile speed and low friction
Most users will arrive from an SMS or a mobile-read email, so design the form for single-column mobile layouts and rapid completion. Use input types that trigger the correct keyboard (email, tel, numeric) and enable browser autofill to reduce typing time.
Other practical tips: keep labels short and visible, use placeholder text for examples (not as the only label), apply inline validation to prevent frustration, and avoid long multi-step flows unless each step offers clear progress. Remove CAPTCHAs from the first interaction when possible—if anti-fraud is needed, test lighter options or move validation to a server-side check after submission.
Reassurance, consent and handling unsubscribe/STOP
Users are more likely to complete a form if they trust how their data will be used. Show a concise privacy line near the submit button explaining what will happen next (for example: how the voucher will be delivered, or that a sales representative will contact them). Avoid legalese; clarity improves conversions.
For SMS campaigns, it is usually important to make opt-out expectations clear and to set user expectations about message frequency. Advertisers should also prepare their internal process for handling unsubscribes and STOP replies in practice.
For this type of campaign, DMS Europe can help advertisers select a proprietary opt-in B2C audience, define the relevant targeting criteria and route the campaign without delivering the contact file. In practice, that means you can focus on the offer, message and landing page while DMS Europe manages routing, reporting and unsubscribe handling.
Measure form performance and plan the handoff to sales or fulfilment
Define the metrics that matter before launch: form completion rate, cost per completed form, click-to-complete time, and post-conversion quality indicators such as booking rate or qualifying call rate. Track both volume and quality—high completion with irrelevant leads is not a win.
Run simple A/B tests on field count (for example, 3-field vs 5-field forms), the presence of trust signals and the CTA wording. Monitor early conversions to validate that the data captured matches downstream processes: can your operations team fulfil the promise in the time stated on the landing page?
Practical handoff checklist:
- Confirm the primary contact field to use for follow-up (email or mobile).
- Ensure the fulfilment team can access submissions immediately and knows which fields are mandatory for qualification.
- Agree on a quality sampling period (first 24–72 hours) to check lead relevance and adjust fields or targeting if necessary.
Actions to implement before launch
Before you go live, run a short internal test: complete the form on several devices, verify autofill and validation, and confirm the confirmation page matches the campaign promise. If you're using both email and SMS channels, ensure the landing page and form language match the message that drove the click.
Keep the initial form minimal, measure the outcomes, and plan to add conditional fields or progressive profiling only after you have validated both traffic quality and operational capacity to follow up quickly.