How to Create a Pop Up/Slider Form

Adding your subscription form as a pop-up or a slider is definitely a good way to attract new subscribers. Here is how you can do it:

Pop-up

1. Choose the Pop-up block under Form Placement menu on your right pane:

2. Go through each of the Pop-up settings:

Toggle the Enable option to activate your pop-up form.

Choose your Form width. You can use either pixels or % to set it up.
You can choose to Display on all pages or choose just specific ones.
You can choose to Display on all posts/products or choose specific ones.
You can choose to Display on posts with these categories or Display on posts with these tags.
You can Show animation on display of your choice.
Display with a delay of sets the delay of showing the pop-up on pages/posts.
Show form every means that if a user closed the pop-up, it will re-appear for them in a specified number of days.
If Exit-intent display is enabled, the form will pop up when moving the cursor away from the site's area in your browser on the exact same posts/pages that are selected in your Form's display settings. Note that it only works on desktop, not on mobile. On mobile, the pop-up will appear according to the delay settings.

The slide-in settings are similar to Pop-up:

In this case, please check the following:

Pop-up/Slider won't show on listing pages such as Blogs, Archives, etc. Pop-up will display on the Shop page and product listings, but can be disabled with the mailpoet_display_form_in_product_listing filter.
Pop-up/Slider won't show on custom posts/pages.
Pop-up/Slider won't show if you've already dismissed it previously. This information is stored as a `popup_form_dismissed_XX` cookie (where XX is the form's ID) and expires after the number of days specified in the "Show form every" setting. Clearing it will make the pop-up appear again.
Pop-up/Slider won't show if a user is already logged in and subscribed to any of the form’s lists.
Pop-up/Slider won't show if a user has already subscribed using the same form.
If a post is in 2 categories and you have 2 forms (one for each category), one of the forms will be displayed only, and it's a random one.
Your theme or another plugin can interfere if your form doesn't show up at all. Please refer to the following guide to rule it out as a root cause: How to Test for Theme and Plugin Conflicts.
If you're using a caching plugin (e.g. WP Rocket), try disabling cache for the page where the form should be displayed.