For individuals who are not familiar, cosplay is shorthand for "costumed play," and it is similar to what that sounds — human beings get dressed in costumes, commonly to depict a selected character, and have interaction with different cosplayers and the general public on social media and at associated fairs and gatherings.
https://www.ccosplay.com/
Cosplay is usually regarded as a sub-cultural activity. The target role played generally comes from animation, comics, video games, light novels, movies, albums, special photos, idol groups, occupations, historical stories, social stories, legendary unique things in the real world (or their anthropomorphic forms) , Or other created tangible characters.

The method is to deliberately wear similar costumes, add props, makeup, body language and other parameters to imitate these characters.