When someone visiting on your website through external URL or any other resources and visitors do not find useful information related to search text or content related to a url, that page called 404 pages or page not found page.
In simple language what a page visitor view when they try to open non exists page or url called 404 page.
404 page is most important page for website. There are few reasons of 404 pages:
- Someone try to open non existing url through external resources.
- Your website have some links which do not exists in your website.
- Someone trying random url though your website url.
In case if user do not find related information on your 404 page, so user will never return to your website. To keep busy visitor on your website you should have good content on your website but 404 pages should have some good content related to current URLs. So user will feel that your website is helping him to find what he searching for your website. So User friendly 404 pages are good options for your website.
For user friendly 404 page you should add some links of related content with good search option. So visitor will visit on other pages or search another things through search option.
Google does not penalty for 404 pages but you should keep visitors busy on your website so for a good user friendly website 404 page play an important role.
Somebody design 404 pages with amazing graphic and some nonsense text but these things does not help to your visitors. Unfortunately they will search for other options.
PayPal Standard is the basic type of PayPal. When this is enabled, the customer will have to fill out your store checkout and will be able to choose PayPal Standard in the Payment section. When they are sent to PayPal, they will be able to log in to their PayPal account or use a credit/debit card without having an account. The line items will be displayed on PayPal and the order will be submitted on their end, not your store’s.
PayPal Express requires the customer to have a PayPal account. When you enable this, it will display on both the View Cart page (as a button) and on the Checkout page (as a choice in the Payment section). When the customer is sent to PayPal, the line items will not be shown. The customer will be sent back to the store to choose their shipping method and will submit the order from the store’s checkout page.
PayPal Pro is considered a payment gateway. You would enable this is in the Credit Cards section of your Payment Settings. You would use this to accept credit cards on your site, and the customer would not know that PayPal is being used. When you set this up, you can either use the API signature or certificate. If you are going to also use PayPal Express, you will need to use the certificate.
PayPal Advanced is the newest type of PayPal integration. With PayPal Advanced, you can accept both PayPal and credit cards on your site. You can set it so that customers are sent to PayPal to pay, or you can give them the ability to pay with a credit card without ever having to leave your site. This type of PayPal will work with all other PayPal types, and since it’s not a payment gateway itself, you can have it enabled alongside a true payment gateway like Authorize.net.