Why am I getting alpha-numeric as part of search without results?

I am sure that users will not type random alphanumeric queries in our search. This is the most common type of search query which we are getting as part of “no results”.

Has anyone faced this? Where is this coming from and how can I address this?

@community1 this may be automated traffic perhaps.

We have a support article here that covers a few possible options to consider: