You may have just completed plans for your ad, landing page, and follow-up email drip campaign. You’ve written your copy, made your videos, and chosen your images. You crossed your Ts and dotted your Is, and you are ready to go.

Or are you?

If you haven’t taken a look at all pieces of your marketing campaign on mobile, then you aren’t ready to launch. You simply cannot ignore the need to be mobile-friendly. Think about it for yourself. Think about how often you read your email, visit a business’ website, or check Facebook on your phone or tablet.

Here’s a list of things to check on mobile before launching your next online marketing campaign.

6 Online Marketing Things to Always Preview on Mobile

• Your Website If your website isn’t mobile-optimized out of the box (preferred), it is possible with a CMS like WordPress to add a mobile plugin that makes your website more mobile-friendly.
• Your Landing Page Getting people to your landing page is one thing, and getting them to opt-in to your offer is a separate marketing challenge. Your copy, imagery, video and opt-in fields need to look correct, be placed well, be sized correctly, and not be cut off when viewed on a mobile device. If your mobile landing page experience is poor, so will be your conversion rates.
• Your Facebook Ad Most Facebook use is mobile, period. And when you build Facebook ads, you can choose the placements for your ads. Even when both mobile and desktop are selected, almost all of your ad’s Reach will be on mobile. You can preview your ad before submitting it for approval in the desktop and mobile view.
• Your Email Newsletters Email newsletter providers offer mobile-optimized templates, so be sure to choose wisely and to send yourself a test email that you view on mobile before scheduling it to go out. Beyond that, keep in mind the differences in preview panes on mobile vs. desktop, too. It’s very likely that fewer characters in your subject line will show on mobile vs. desktop. 
• Your Online Store* This gets an asterisk because a mobile shopping experience is never a great one. It’s simply easier to shop on your laptop or desktop unless you already know exactly the item you want to purchase. One exception to this is if you have an app created for your online catalog as apps typically provide a somewhat better shopping experience.
• Your Social Media Imagery Most notable are the sizing differences in cover photos like your Facebook and Twitter covers (the sides are cut off on mobile).

Mobile-friendliness is only going to become more and more a necessity going forward. In fact, shifting your focus to mobile first, and desktop second is going to be the best way to go.