We teach in our job finding club that you should always call the company you are interested in and get the name of the person you are writing to. You can just call the reception and say that you are addressing a letter and need to know the name of the person in charge of hiring for this add. Also make sure you ask them how to spell that person's name. And, if it's a gendre neutral name confirm if it's a Mr. or Ms. you writing to

Have you looked at the company's website at all? You want to mention something in the cover letter that really stands out to you, so something like, "In my research on your company, I was very impressed with your mission statement. I am also a firm believer in blah blah and my values really align with yours." If you can, when you call them to get the name of the person you are writing to, ask the receptionist a few questions. Figure out what is meaningful to you and ask about it, so you might ask if they have a social committee, or what the receptionist's favourite part of working there is. Then you can also include "When I was talking to Jane in your front office, she mentioned how you have a blah blah and do lots of activities with employees. This is something I know I can be a part of because I have been involved in organizing blah blahs in the past. She also mentioned that working there is like working "with a family" which is the exact type of environment I am looking for."

So basically, you want to make sure your cover letter says something different than all the other applicants that makes you stand out. If you make a call to someone in the organization and you can mention it, it will show them that you are interested as well as taking initiative