What i should do with this NOT FOUND Page? - Google Webmaster experT ans PLZ..

Recently i registered a expired domain. which is 5 years old.

But, when i add my domain in Google Webmaster i found many NOT FOUND Page.
Thare have also soft 404



My qsn - Its will bring bad effect For SEO Ranking?
2nd qsn - How i can remove all NOT found page and soft 404 page ? Can i remove all at Once?

Thank you all...

It is likely that the domain name used to have a website on it and google is trying the old URLs that no longer exist. Or someone pointed a new domain at your server and your server is configured to show the website by default for any domain pointed at the server. In that case the 404s are the old URLs for the pointed domain.

It is hard to know what is going on without clicking into the logs to looking at the referring pages to the 404 URLs. Investigating the referring pages should shed some light if it is one of the two issues I described.

Removing in GSC usually doesn't do anything because google finds the 404 links again out in the world. 404s usually mean you have orphaned backlinks and you should redirect them to the most appropriate page to recapture the SEO value and clean up the 404s.

Use google webmaster tools to index site first and then re-run search after couple hours this should solve your issue,

hey! plz read my qsn again.. try to ans my qsn... no need anything...!!

I bought a domain like this 3 years ago ... It kept showing errors and errors like that. One time i logged in and got 1000 404s i am not sure if the previous owner kept some automated shyt that kept generating pages or what...
Funny thing it ranked well infact i made money alot while page one. The SEO effd up by pumping so many pbn it got a manual action for spam After penguin 1. I left it to die a slow death..

After an year i moved it from goddady to namecheap servers and 301 it to another domain. My new domain started showing 404s but i get like 20 404s nowadays. It has served it's purpose now i am dropping that domain forever i hate those errors any new domain i point to shows the 404s. Changing the server never solved, changing website never solved, changing my SEO never solved

Conclusion: i have never gotten an answer whats the reason for that