What is the easiest way to watermark multipile pictures and is it necessary initially when starting out ?

I plan to start an instagram blog. I would create my own content,but adding watermark to each and every picture seems too consuming on my part. Is there a way i could do that to multiple pictures ? And since I am just starting out I was wondering is it even necessary ?

Submitted May 09, 2019 at 11:47PM by BrandonCole84 https://www.reddit.com/r/Blogging/comments/bmwbaq/what_is_the_easiest_way_to_watermark_multipile/?utm_source=ifttt