As well as contacting you directly, employers can also post internships.
To see what internships are going at the moment, login and click the availability tab on your dashboard.
You'll be able to see any available internships that are relevant to your skills. You can also update your availability while you're at it.
Have a look at the info about the internship and the company. If you're keen, click on I'm interested and we'll let the employer know.