The "Read More..." feature you often see on websites is a great way to reduce the amount of wordage on your page and let viewers drill down to what they want to read.
Using Weebly we can download the Accordion app and achieve the expand/collapse text function.
However if we are using Wix it's a little more complicated and will require some coding, it took me about 6 hours to work out how to use the code in the instructions below...
Wix Show More Coding
We can also have a look at how to use HTML & CSS code to create an expand/collapse text function...
W3 Schools Coding Practice