Hi Ciaran,
It is possible with if you use the Index Table engine. On the Relevance Options -> Index Table Engine you can change the Custom Field weight value: https://i.imgur.com/amozAIx.png
It does not mean however that certain custom fields are more relevant than others, it means that if the search phrase matches something from a custom field value, it’s relevance is determined by this weight value. Unfortunately it is not possible to assign custom relevance/priority to certain custom fields.
I’ve looked if I can suggest any modification, but the relevance is calculated based on value matches, and at that point in the query there is no information about the custom field keys, only values – therefore it’s not possible to assign a custom priority information to them, I’m sorry.
Best,Ernest Marcinko
If you like my products, don't forget to rate them on codecanyon :)
