pajko

This plugin will enable you to add any kind of slide in/out popups to your WordPress website. 
New widget, called “SlideIn Box”, is added. Each of these widgets can hold one slidein box content, whitch can be any HTML or PHP code. Inside these widgets you will have complete control over your slidein box layout. 
New widgets sidebar, called “SlideIn Boxes”, is added, where you should place all defined “SlideIn Box” widgets. After that, they will be selectable from the dropdown menu on Global SlideIn Options page, and inside page/post meta boxes.
<ul>
<li>You can control the position for each SlideIn box. </li>
<li>You can control when will these SlideIn boxes display to your visitors.</li>
<li>You can specify delay for each SlideIn box.</li>
<li>With little HTML/CSS knowleadge you can have your own styles for toggle and close buttons. </li>
<li>Page/post settings will override global settings for SlideIn boxes.</li>
</ul>

Slide In Popup

Define the bottom edge slide-in box with any HTML/PHP globally or for each WP page/post.

vaakash

Announcer is the ultimate WordPress notification bar plugin designed to help you display important messages, promotions, cookie notices, and alerts anywhere on your site. Whether you want to welcome new visitors, drive traffic to a seasonal sale, or ensure GDPR compliance with a cookie banner, Announcer makes it incredibly easy.
Built to be lightweight and user-friendly, you can create eye-catching sticky bars that capture attention without slowing down your site. Add powerful Call-To-Action (CTA) buttons, set up customized display rules, and start boosting your user engagement and conversion rates in minutes.
See it in action: View the <a href="https://wpdemos.aakashweb.com/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro" rel="nofollow ugc">Live demo</a> of the plugin!
<h3>⭐ Why Choose Announcer? (Core Features)</h3>
Announcer is packed with market-leading features to give you complete control over your website banners:
<ul>
<li>Unlimited Announcements: Create and manage multiple notification bars at the same time.</li>
<li>Flexible Positioning: Display messages at the top or bottom of your site.</li>
<li>Smart Stacking: Neatly stack multiple banners if more than one announcement is active on a single page.</li>
<li>Sticky & Fixed Layouts: Keep your message in view as users scroll, or fix it to the top of the page.</li>
<li>Advanced Scheduling: Automate your promo bars by scheduling a start and end date/time.</li>
<li>Call-To-Action (CTA) Buttons: Drive clicks with customizable buttons that can open links or dismiss the banner.</li>
<li>Horizontal Ticker: Display longer text beautifully with a smooth scrolling news-ticker effect.</li>
<li>Smart Cookie Control: Allow users to permanently close notices, or set them to re-display after a specific time.</li>
<li>Rich Content Support: Insert any content into your banner, including images, HTML, or shortcodes from other plugins (like forms).</li>
<li>Conditional Display Rules: Target specific audiences by showing banners only on certain pages, posts, or categories.</li>
<li>100% Mobile Responsive: Designed mobile-first to ensure your announcements look perfect on any screen size.</li>
<li>Customization Made Easy: Choose from multiple layout options and unlimited color palettes to match your brand.</li>
<li>Trigger Options: Automatically display banners based on a time delay or user page scroll.</li>
<li>Smooth Animations: Engage users with sleek open and close transition effects.</li>
<li>Multilingual Ready: Target announcements based on your WPML translated post language.</li>
<li>Lightweight & Secure: Clean code that won’t bloat your site, fully GDPR compliant.</li>
</ul>
<h3>🚛 Popular Use Cases & Ideas</h3>
You can use the Announcer plugin to create a wide variety of sticky messages, including:
<ul>
<li>Promo Bars: Highlight sales, discount coupons, and seasonal offers.</li>
<li>Compliance: Display a GDPR-friendly cookie consent banner or privacy policy updates.</li>
<li>Lead Generation: Embed newsletter sign-ups (Mailchimp, WPForms) directly into the banner via shortcodes.</li>
<li>Alerts & Updates: Share important site-wide notices, business hours.</li>
<li>Content Promotion: Drive traffic to new blog posts, product launches, or special events.</li>
<li>Welcome Messages: Greet new visitors with custom introductory notes.</li>
<li>Social Proof & Feedback: Share quick links, social icons, or ask for customer feedback.</li>
</ul>
<h3>💎 PRO version</h3>
Ready to take your announcements to the next level? The PRO version offers advanced marketing tools designed to maximize your conversions and give you pinpoint targeting capabilities:
<ul>
<li><a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">Multiple Messages (Ticker/Slider)</a> – Maximize your screen real estate. Add a slider or auto-playing ticker to display multiple messages within a single announcement bar, complete with next/prev navigation.</li>
<li><a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">Urgency Countdown Timers</a> – Skyrocket your sales! Embed fully customizable countdown timers right into your promo bars to create FOMO (Fear Of Missing Out) for limited-time offers.</li>
<li><a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">Advanced Animations</a> – Grab instant attention with eye-catching entrance animations for your banners and funky effects for your CTA buttons.</li>
<li><a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">Smart Visitor Targeting</a> – Show the right message to the right user. Conditionally display banners based on traffic source (referrer), device type, OS, browser, user login status, user role, or even visit count!</li>
<li><a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">Shortcode Placement</a> – Need a banner inside a specific post? Use shortcodes to place your announcements exactly where you want them, inside pages, posts, or theme templates.</li>
<li><a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">One-Click Duplicate</a> – Save time by instantly cloning your favorite announcement setups.</li>
</ul>
<a href="https://www.aakashweb.com/wordpress-plugins/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro#pro" rel="nofollow ugc">Check out the PRO version</a> | <a href="https://wpdemos.aakashweb.com/announcer/?utm_source=readme&utm_medium=description&utm_campaign=ancr-pro" rel="nofollow ugc">View PRO Demo</a>
<h3>👋 Feedback & Support</h3>
We love hearing from our users! If you run into any issues, have questions, or want to share a feature request, please reach out to us in the <a href="https://www.aakashweb.com/forum/discuss/wordpress-plugins/announcer/" rel="nofollow ugc">Official Support Forum</a>.

Announcer – Sticky Message Banner & Notification Bar

I tried a few other banner plugins but none of them did what I needed: multiple banners displaying conditionally on specific pages.  Announcer got the job done - thank you!  A+

Worked as advertised!

After searching through quite a few announcement bar plugins, I found that this is the best one. The conditional display settings are awesome. 

Well built admin interface and front end works perfectly.

Add customizable WordPress notification bar to display announcements, promotions, coupons, or news at the top or bottom of your website.

Slide In Popup vs Announcer – Sticky Message Banner & Notification Bar