It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
This image was acquired from
Keywords from Image Description:
thumbtacks white paper red business office blank note pushpin plastic tack stationery drawing school symbol push reminder set collection macro empty board button design shadow icon memo notice tool thumb computer render blue pin nobody supplies
Page 2017 Free-images.com. All images are Public Domain