Page loads very slowly or is not available

Hello,

recently everything on the website loads very slowly or the page is not available or timed out. It suddenly became so, there was no update or something else.

Can you find out why my page (also in WordPress) everything loads only very slowly or the website is partly not available anymore? It is almost impossible to work on the website like this.

Most of the time, following error comes:

<span style=”color: #646464; font-family: ‘Segoe UI’, Tahoma, sans-serif; font-size: 12px; text-transform: uppercase; background-color: #f7f7f7;”>ERR_CONNECTION_TIMED_OUT</span>

What could be the Problem?