How to grow your store's email list with chat, pop-ups and quizzes

The busiest traffic of the year is three months away, and most of it will leave without buying. From Black Friday to Christmas, gift shoppers compare three stores, check delivery dates and disappear. In January the ad prices drop and the traffic goes with it, and you're left with the customers you can reach for free: the ones on your list. The list you have in December is the one you build now.

An email list is the only audience a store owns. Social reach changes with every algorithm update, and ad costs change with every auction. A subscriber can be reached tomorrow, next month and next Black Friday at almost no cost.

This guide covers how to grow that list without turning your store into a wall of pop-ups, and how to keep it healthy enough that your emails still land in the inbox.

Why most stores' lists grow slowly

The usual setup is a 10%-off pop-up that appears three seconds after landing, on every page, on every device. It produces a few problems:

• It interrupts before it helps. Visitors haven't seen a product yet, so the offer means nothing.
• It attracts discount hunters. People subscribe, use the code and unsubscribe.
• It ignores intent. A shopper who just asked a detailed question about sizing gets the same pop-up as someone bouncing from an ad.
• It hurts on mobile. Full-screen pop-ups that hide content can harm your mobile search rankings under Google's intrusive interstitials guidance.
• It brings low-quality addresses. Typos and throwaway emails hurt deliverability.

A better approach offers different reasons to subscribe at different moments, and captures emails where shoppers are already engaged.

Step 1: Decide what you're offering in exchange

People give you their email when they get something they want. A discount is one option, but not the only one, and not always the best.

Offer	Works best for	Margin cost
First-order discount	New visitors from ads, price-sensitive categories	High
Free shipping on the first order	Stores where shipping costs block purchases	Medium
Back-in-stock alert	Popular or limited products that sell out	None
Size or product recommendation	Fashion, beauty, gear with many options	None
Early access to sales or drops	Brands with loyal fans and regular launches	None
Useful content (guides, recipes, care tips)	Products people need to learn to use	None
Giveaway entry	Building a list quickly before a launch	Low, but low-quality sign-ups

Most stores should run two or three of these, each in the right place, rather than one discount everywhere.

Step 2: Capture emails in conversations

The visitors who ask a question are some of your most engaged traffic. They are interested enough to type, and they often leave if the answer comes too late. That makes chat one of the best places to collect an email, as long as you give an answer in return.

Good moments to ask in chat:

• "Is this coming back in stock?" Offer a restock alert by email.
• "Which size should I get?" Answer, then offer to send the size guide and a reminder.
• "When will it arrive?" Answer, then offer delivery updates or a reminder before the shipping cut-off.
• Out of hours. Ask for an email so you can reply in the morning, with a checkbox to also receive news.

Keep consent explicit: a separate "Yes, send me news and offers" option, not a hidden assumption that anyone who chats wants marketing. In Tidio this is a pre-chat survey or a Flow step that subscribes the contact and syncs them to Klaviyo or Mailchimp.

Step 3: Use pop-ups that respect the visit

Pop-ups work. They work better when they are timed and targeted:

• Wait for a signal. Show after someone has viewed two products, scrolled most of a page, or shows exit intent, not after three seconds.
• Match the page. A back-in-stock form on sold-out products, a size quiz on category pages, a shipping-cut-off reminder in December.
• Keep mobile light. Use a small banner or slide-in instead of a full-screen overlay.
• Don't repeat yourself. If someone closes it, don't show it again on the next page. Never show it to existing subscribers.
• Test one thing at a time. The offer, the timing or the copy, and measure subscribers who later buy, not just sign-ups.

The best sign-up form is the one that answers the question the visitor already has.

Step 4: Add a quiz for stores with many choices

If shoppers struggle to choose (skincare routines, coffee blends, running shoes, gifts), a short product quiz helps them and grows your list at the same time. Ask four to six questions, show a recommendation, and offer to email the result with a short explanation. People who finish a quiz have told you what they want, which also makes their first emails much more relevant.

Step 5: Collect consent properly

A big list you can't legally email is worth nothing. Get the basics right:

• Make consent clear and separate. A checkbox or explicit button, not a pre-ticked box or small print.
• Say what they'll get and how often. "Weekly new arrivals and occasional offers" sets honest expectations.
• Use double opt-in where it is expected. GDPR doesn't strictly require it, but it is the standard way to prove consent in Germany, Austria and Switzerland. Many email platforms let you turn it on by country.
• Keep SMS separate. SMS marketing needs its own explicit consent in most markets, including under US telemarketing rules.
• Record where each subscriber came from. Chat, pop-up, quiz or checkout, so you can prove consent and see which source brings buyers.

Step 6: Welcome new subscribers properly

The first email gets more attention than any later one. Send it immediately, deliver what you promised (the code, the guide, the quiz result), and introduce what makes your store different. A short welcome series of three or four emails over two weeks is enough for most stores. Tailor it to the source: a restock subscriber wants the restock, not your brand story.

Step 7: Keep the list healthy

Since 2024, Gmail and Yahoo have required bulk senders to authenticate their email, offer one-click unsubscribe and keep spam complaint rates below 0.3%. Microsoft added similar rules for Outlook addresses in 2025. A list full of people who never wanted your email will push you over that line. To stay safe:

• Don't buy or import lists of people who didn't subscribe to you.
• Remove addresses that bounce, and stop mailing people who haven't opened in months.
• Make unsubscribing easy. A frustrated subscriber who can't leave clicks "report spam" instead.

Common mistakes

• Discount-only sign-ups. A list that only responds to coupons erodes margins.
• Pop-up overload. A pop-up, a chat prompt and a cookie banner on the same screen sends people away.
• No consent trail. You can't prove where an address came from.
• Ignoring chat as a source. Your most engaged visitors leave without a way back.
• Same welcome for everyone. A quiz taker and a discount hunter want different first emails.

How to set this up before the holiday rush

1. This week: move your discount pop-up from "three seconds on every page" to exit intent on desktop and a small banner on mobile.
2. Add back-in-stock capture on sold-out products, which is especially valuable when the holiday rush empties shelves.
3. Set up email capture in chat with Tidio: a pre-chat question for out-of-hours visitors and a Flow on the cart page, synced to Klaviyo or Mailchimp.
4. Turn on double opt-in for German, Austrian and Swiss visitors, and record the sign-up source.
5. Write a welcome series for each source.
6. After the holidays, review which sources brought subscribers who actually bought, and put more effort there.

To turn new subscribers into first orders, see how to reduce cart abandonment with live chat, or compare alternatives to Privy.