Reviewers decision: Summary rejects typically do not receive technical feedback I would like to know what does this imply "Summary rejects typically do not receive technical feedback". Is that mean that work has a flaw?
"Summary" here is used in the sense of "performed speedily and without formal ceremony" (see Wiktionary, adjective definition 2).

They have concluded that the paper is clearly not suitable for publication in this journal / conference, and so they are rejecting it without a full review.  In such a case you will not receive detailed technical feedback about the work.

Some possible reasons:


The work is on a topic not covered by the conference
The importance or interest of the result is much less than what the conference normally expects
The work has major obvious technical flaws
The paper is extremely poorly written or incomprehensible
Your paper doesn't conform to the conference's submission requirements  (e.g. formatting, page count, double-blinding)


It would be wise to have a colleague in your field look at the paper before trying to resubmit somewhere else.