grep in linux

While reviewing a script, I found the following line :
grep "\" 404"

Does it want to search for a pattern  [\" 404 ]  ?
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Kanti PrasadCommented:

Yes it will search for the 404 errors
Manfred BertlManagerCommented:
Indeed it does search for that pattern. But it would work anyway w/o that "\".
To be exact the command searches for a double quote character followed by a space followed by 404:

" 404

The double quote character is escaped so it's searched literally.

These will match:

foo bar " 404 more text"
" 404 more text"

but these won't:

foo bar 404 more text
404 more text
"404 more text"

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Gerwin Jansen, EE MVETopic Advisor Commented:
It is looking in a web server log file for pages that could not be found / served by the web server.
AXISHKAuthor Commented:
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