Both digital and printed images are intellectual creations and therefore are copyrighted.
That we have freely accessed them, for example, through the internet, does not mean that we can use them in a job, on a website or in a presentation.
Before using an image (photo, drawing, graphic ...) we must make sure that we can do it. In addition, when people appear in the photographs, the self-location of the photographed person must be counted.
That it be used as an appointment or for its analysis, comment or critical judgment (art.32.1 LPI).
It can also be used when published under a Creative Commons license, provided that they are carried out within the limits established in each case in the respective license.
ALWAYS CITE THE IMAGE SOURCE AND ITS AUTHOR!
Whenever we have doubts or it is not clear how we can use an image, it is preferable to ask permission to use that image. We identify the contact person, author, publisher or responsible company; We write a message requesting authorization and clarifying the scope and purpose of the use we wish to make; Once the response is received, we keep it and follow its instructions.
Resources to search for images with CC licenses
Google Images : option to filter by use rights, from the tools tab.