Web Clip is not changes

I have a wired issue - I set a web clip in the site settings, but when I write the site name in the browser i see webclib image is not changed. i have created 2 different site first one is accurately working but second one is not working you can check from images please guide me about this isuue. i have clear my browser cheche but its stil remain same

Google search central clearly communicates how SERP snippets work and what options you have to work within those constraints. I suggest you refer to the authoritative source.

How to Write Meta Descriptions | Google Search Central  |  Documentation  |  Google for Developers.