Where can I put Logging mechanism on my code

I am using asp.net mvc applicaiton and I am new about cross cutting concers. So I need to know where can I use my logger code following example.

I have an interface that logs erros. I am implementing this interface on my code.

public interface ILogger { void Log(Exception exception); }

So I have Controller, ProductService, ProductRepository classes.

public interface ProductController: ApiController{

     public IHttpActionResult Get(){
            try {
                productService.GetProducts();
            }catch(Exception e){
                logger.Log(e); // 1-Should I use logging in here?
            }
     }
} 

Product service;

public class ProductService{
    public IEnumerable<Product> GetProducts(){
            try {
                productRepository.GetAll();
            }catch(Exception e){
                logger.Log(e); // 2-Should I use logging in here?
            }
    }   
}

In repository.

public class ProductRepository{
    public IEnumerable<Product> GetAll(){
            try {

            }catch(Exception e){
                logger.Log(e); // 3-Should I use logging in here?
            }
    }   
}

I could not determine where can I use logging code. Or add logging in everywhere.