What does this error mean and how can I fix it? I do not know what this "notice" means:


  Notice: Undefined index: content in ds_render_block_field() 
  (line 947 of
  /home/magpie/public_html/mysite.com/sites/all/modules/ds/ds.module).
  Notice: Undefined index: content in ds_render_block_field() (line 947
  of
  /home/magpie/public_html/mysite.com/sites/all/modules/ds/ds.module).


I am tempted to just delete the line but I think it is best to check first and verify that it is not important.

Can somebody help explain how errors like this occur? And how to prevent them and deal with them?
It's a notice, not a big deal to make you worry as it says, there is an undefined line in your display suit module