Optimize your campaign. Do you have broad match keywords ?
Check the search term(s) report (in Google Ads), to identify irrelevant keywords / non-performing keywords, you may also need to add some keywords into the negative keywords list.
Is the location targeting proper ?
Is there an EXTREMELY close co-relevance between the keywords, ad headlines, ad descriptions and the landing page ? If not, then ensure that there is.
Deselect Google Search Partners (in the campaign), as clicks via those are mostly irrelevant / bot clicks.
Is the landing page mobile friendly ? Do adjustments need to be made to a particular device in device targeting OR or even exclude a device in device targeting ?
You need to optimize your campaign.