Mobile marketing is growing fast, and there’s no sign that it’ll slow down anytime soon. As people increasingly tote their smartphones and tablets everywhere they go, marketers have realized that mobile is a key opportunity to engage with customers. That mobile engagement doesn’t just mean notifying a customer about a Valentine’s Day sale via push or delivering a 10 percent discount to a customer’s Passbook. Rather, it’s reaching customers on every mobile channel at their preferred time.

Still not convinced that mobile is key to a successful digital marketing strategy? Here are 19 stats about mobile marketing’s growth that will change your mind:

Mobile marketing performance

1. Mobile marketing ad spend grew more than 100 percent in 2013. (Source: Mobile Marketing Watch) Tweet This Stat

2. 85 percent of smartphone users would rather “give up drinking water” than delete their mobile apps. (Source: Apigee) Tweet This Stat

3. 43 percent of customers are more likely to make a purchase when mobile offers are part of an orchestrated campaign that unfolds over time across multiple channels. (Source: Responsys)

Delivering value that’s personalized and relevant

4. 70 percent of consumers found all types of push notifications, including order updates and location-based messages, to be valuable. (Source: Responsys)

5. Nearly a third of consumers have subscribed to mobile marketing from brands, but 35 percent of them aren’t getting relevant messaging. (Source: Responsys)

6. 90 percent of consumers who have joined mobile loyalty programs feel they have gained value from them. (Source: ZoomerangTweet This Stat

7. Nearly two-thirds of consumers subscribed to mobile marketing indicate that they have made a purchase as a result of receiving a highly relevant mobile message. (Source: Responsys)

The reign of mobile marketing channels

8. The open rate of SMS is 98 percent compared with 22 percent for emails. (Source: Venture BeatTweet This Stat

9. Text messages can be 8x more effective at engaging customers. (Source: CellitTweet This Stat

10. 68 percent of consumers who have downloaded a brand’s app have enabled push notifications. (Source: Responsys) Tweet This Stat

11. Passbook retail offer campaigns deliver a 3x increase in incremental in-store sales when compared with the same offer via email. (Source: Responsys)

Increase in purchases from mobile devices

12. 63 percent of all tablet owners have purchased a product or service from their device, compared with 39 percent of smartphone users. (Source: eMarketer)

13. 70 percent of mobile browser searches lead to action within an hour — 40 percent are on tablets and 60 percent on smartphones. (Source: iAcquire)

14. 9 out of 10 smartphone shoppers used their devices to buy products while at a brick-and-mortar store. (Source: JiWireTweet This Stat

A mobile-first mindset

15. Marketers who implement responsive design report a 20 percent increase in clicks and conversions on average. (Source: Responsys)

16. Half of smartphone users say, “If a retailer’s technology isn’t easy the first time, I’ll stop using it.” (Source: First Data)

17. 47 percent of consumers want mobile offers on their devices when they pass by a store. (Source: comScore and UPSTweet This Stat

18. An estimated 54 million consumers in the U.S. will use smartphone coupons in 2014. (Source: eMarketerTweet This Stat

19. Mobile offers are redeemed 10x more frequently than print offers. (Source: eMarketerTweet This Stat