How do you output the Image Caption on an asset? When you double-click an asset you can set the Image Caption:



How do you structure the query to output this Image Caption "field?"
You should give a try:

{{ craft.assets.filename('refresh1.png').one().imageCaption }}


Where imageCaption is the handle of your Image Caption field (imageCaption is an example, you should check this value).

More informations about how to fetch assets: https://docs.craftcms.com/v3/dev/element-queries/asset-queries.html