We recently made some changes in how Search Console reports & calculates clicks and impressions in Search Analytics.

As a result, you may see a change in the click, impression, and CTR values shown there. For most sites, this change will be minimal. A significant part of this change will affect website properties with associated mobile app properties. Specifically, it involves accounting for clicks and impressions only to the associated application property rather than to the website. Other changes include how we count links shown in the Knowledge Panel, in various Rich Snippets, and in the local results in Search (which are now all counted as URL impressions).