Stock images are the best way to give your posts an edge and reach more potential readers. It is best to use public domain images rather than potentially copywritten material available through a simple google image search. Using copyright material without permission hurts the artist and is technically committing a crime.
Below are some resources where you can find quality public domain material for your posts on steemit
Pixabay - https://pixabay.com/en/tablet-touch-screen-reading-glasses-600649/
Pexel - https://www.pexels.com/
Happy posting!
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