While the notice says it’s going away on February 28th, it actually is already gone on my Your Computer Lady business page. They will roll out this change across all business pages so you’ll have to watch your page to see when it happens.
Copy the content from your Story section TODAY and save it in a Word doc for reference.
Note that the About Page has become a minor page which is now hidden under the More drop-down.
The About Page itself has been re-designed. All of the details like Hours, Phone, etc. are at the top of the Page. The entire Story section is gone. (It had an additional photo and unlimited area for text. I used it to add keywords.)
Now there is only a About section which is limited to 255 characters.
You do have an Additional Information section. This appears to be unlimited text. Move your content from the Story section to this Additional Information section. Load it up with keywords to help people who are searching for your product or service.