Hi,
Software testing courses will definitely help you to place in IT companies, it will be like entry pass for interview.
So I will always recommend you to go ahead and do the certification.
There are two types of testing
1) Automation testing<br />
2) Manual testing
Automation testing is having much scope when compared to manual testing.
So further I recommend you to do certification in Automation testing.
Note: Certification is like identity in interview, it may testing, development whatever ;-)
Hope this helps you a bit.
Regards,
RK