Http status code checker will check if your website returns the wrong HTTP status code, wrong status code will make search engines cannot index your web pages. For that reason, it is important to check the response code that your web server sends to search engine spiders and make sure your web pages HTTP status code indicate ready to crawl.
Your web server should return a "200 OK" code. All other codes mean that search engines could have difficulty to index your website.
If you get the result from HTTP status code checker "302" then the URL that you entered is only a redirect to another URL. A 302 redirect is a temporary redirect to another URL. Search engines don’t like these redirects because they have been abused by spammers in the past.
If you want to redirect your web pages, it’s better to use a 301 redirect. A 301 redirect is a permanent redirect that tells search engine spiders that the requested page can now be found under a new URL.
Search engines see your web pages with different eyes than web surfers :-).
If you have a wonderful website design that is meaningless to search engines, you won’t be able to achieve high search engine rankings with that web site – no matter how good and interesting your web site content is, because when people search through search engines your web page will not there on the search results.