Hi Jacek, This is most likely because some clicks were considered invalid <https://support.google.com/adwords/answer/42995?hl=en> for this campaign. You could download the Click Performance Report <https://developers.google.com/adwords/api/docs/appendix/reports/click-performance-report> to validate this as it includes stats aggregated at each click level, and includes both valid and invalid clicks. You could also query for InvalidClicks <https://developers.google.com/adwords/api/docs/appendix/reports/campaign-performance-report#invalidclicks> form Campaign Performance Report, which provides the number of clicks which weren't charged as they were considered illegitimate.
Let me know if this helps. Regards, Shwetha, AdWords API Team. -- -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and Google+: https://googleadsdeveloper.blogspot.com/ https://plus.google.com/+GoogleAdsDevelopers/posts =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en --- You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To unsubscribe from this group and stop receiving emails from it, send an email to adwords-api+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/adwords-api. To view this discussion on the web visit https://groups.google.com/d/msgid/adwords-api/86a695c5-fef8-4af6-b32f-74587057ae4a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.