If you are using Facebook advertising, you need to be aware of this critical update.
Beginning August 19th, 2019, Page posts and ads on mobile will match the look and feel of the new Facebook design which was introduced earlier this year.
Fewer lines of primary text will show on mobile News Feed. Now only 3 lines of primary text will show on Facebook mobile News Feed, after which people will be prompted to click to view additional text.
Maximum media height for photos and videos will reduce to 4:5 on the mobile News Feed. The tallest supported aspect ratio for images without links and for videos is now vertical (4:5). Media taller than 4:5 will be masked on Facebook mobile News Feed.
Key take out from the changes in Facebook’s claim that it will help drive increased ad effectiveness and make it easier to use the same assets on Facebook News Feed and Instagram feed. At the same time, the changes to the text, photos and videos are designed to simplify the formats and improve the consistency of your mobile experience, giving it more uniformity across the platforms.
So come August, you need those creative juices on overtime to make those first three lines super-snappy, at the same time, keep in mind the changes to image height to ensure an optimal presentation of your ads.