How we can add priority for this list, Like if the web page have twitter:description and description metadata, I like to give more priority to twitter:description displaying in search result summary.
If you know that your description is in a particular field I would suggest adjusting the metadata mappings and either remove the fields that you don’t use, or map the field that you are interested in to a separate metadata field (e.g. searchDescription) then use this in your search results template.
If you must assign a priority you’ll need to map each metadata field to a separate class and then use conditional logic in your template to handle the order of display.
Not using different description, trying to give weight or priority for description. Like if the page have meta description, twitter description. I like give priority meta description over twitter description.