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If you have writing on Wattpad and you want your Twitter followers to read it, you'll need to leave a link to your work. Links take up a lot of characters and Twitter limits you to only 140 so you have to be clever in putting your point across with as few words as possible. You will also have to shorten any links. You can use tinyurl.com (one of several) which will take it down to 26 characters.
No idea about technical stuff!
Self evident by now, surely...?