You can use the "Quick Input" action to type text, or you can use the "Set a Text Value to the Windows Clipboard" action followed by a keypress action that presses Ctrl-V to paste text (noting that it does overwrite the previous contents of your clipboard).
Depending on your browser settings, another option is to use the "Run an Application" action with the URL you want to use directly (if Chrome is your default browser), or to put the URL in the "With these parameters" field, and launching the Chrome executable.