It is scary to think that there are many people who are thrust into the process of trying to fill out college applications without the details that they need about how to do it well. This is why it is so important to make sure you think about how to create the perfect application.
One of the things that must be considered is personalized recruitment messaging for higher educ. This is a great way to make sure you are able to show the particular institution that you have sent your application to.
You should NOT mass message a lot of different institutions with the same letter. This might be easier for you from a labor perspective, but it will send the wrong message. You need to show those institutions that you truly care about the relationship that you will build with them, and the best way to make that a reality is to send out personalized letters to each institution.
It will take more time to work on individualized letters, but it might also net you more results with the letters that you do send out. Put this in your mind and understand that this is where you need to go.