How do I check my own site for errors?

Guys, a question for those who have created their own sites. I am still new to this business, so some points are not clear. The site is already running, but every once in a while there are different errors. Also drops dramatically in attendance. How to fix it?

Unfortunately, this problem is faced by everyone who has his own website. But the problem itself is solvable. Your main task - to find out the reasons why it happens. Here on this service is an opportunity to use the website error checker and conduct a detailed analysis https://pr-cy.io/ I think you will definitely understand