Select the signup form you’d like to use and click on Publish (step 4)
Select "Pop-up from a button on your Website".
You’ll see a box with HTML code in it. Only copy the first URL/Web address within the quotation marks and save it for the next step. (Incase the entire code is getting selected when you try to copy, you may have to 1st paste the code into Notepad/Textpad and then copy the URL/Web address shown below )
2) Shortening the URL
In order for the link to work correctly, it must be shortened through the website Bit.ly.
Paste the link from the previous step into the box and click Shorten.
Note: The default shortened URL is abstract. If you want to display something meaningful to help readers better understand where the link is going, then you can customize the way the link looks according to your requirement. E.g. http://bit.ly/my_signup_form All you have to do is sign up for a free account with Bit.ly
Click Copy to copy the shortened URL.
3) Twitter
Log into your Twitter account and click on the Settings from dropdown menu at the top of the screen.
Click on the Profile tab
On the Profile tab look for a box labeled ‘Website’