+
Means Ahead Some Lines, Add or Quantifier (in Regexp)
Plus (+) means move ahead a relative number of lines.
/mod *+1A plus sign at the Visual home line means move roll ahead a number of lines.
===>+15 {roll ahead 15 lines}
Plus in the calculator means add (e.g., =5+10).
A plus sign (+) in regular expressions indicates the preceding element might repeat one or more times in the text.
/list "op+q" (regexp) {"p" must be there one or more times}