If your website is receiving heavy traffic from random or unwanted bots, you can block them by adding rules like this to your .htaccess file:
# Block bad bots
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} (AhrefsBot|SemrushBot|MJ12bot|DotBot|Baiduspider) [NC]
RewriteRule .* - [F,L]
This example blocks some commonly known crawler bots.
You can replace or add bot names as needed (e.g., competitors bots).