You probably have one of the following two configured:
- Output cache (full page) - caches the full HTML output of pages.
![Image Text](https://content.screencast.com/users/DavidTK/folders/Jing/media/ed1b8020-5e22-4ab8-b35f-14ed40cfb675/2018-09-14_1532.png)
- Partial output cache - caches the HTML output of individual page components (web parts).
![Image Text](https://content.screencast.com/users/DavidTK/folders/Jing/media/17c6b492-e93f-4c53-8ff7-4784edc985f1/2018-09-14_1534.png)
Check the following docs for info docs.kentico.com/...Configuringcaching-Cachetypes