Your site sends visitors to a spam, scam or betting page. The attacker added code that runs on every visit. Often it hides from you when you are logged in, so you only see it on your phone or from Google.
siteurl and home in the wp_options table..htaccess file in the main folder (rewrite rules pointing elsewhere), the top of wp-config.php and index.php, and your theme's functions.php and header.php. Long lines of scrambled text with eval or base64_decode are the sign.<script in posts and options. Injected scripts often sit in post content or widget text.If the redirect keeps coming back, send me the address and I will find where it is loading from.
Want the rest of your site checked after it is back? Run a free 40-point check at tinkeraudit.com.