A One Page (sometimes called One Step) Checkout implementation on eCommerce websites reduces the number of steps in conversion. It shortens the funnel, increases conversion and reduces cart abandonment. When we replace standard checkout with OPC, we loose functionality to save abandoned carts as prospects. These prospects can be 'incentivized' later to complete transaction. It is recommended to implement save prospect on minimum data entered in tandem with One Page Checkout. We have written a blog article on it which explains OPC in even more detail.
We are eCommerce/Magento implementation experts and have consultants who can help you implement features like this that will impact your topline.
On Page Optimization
Abandoned Cart Management
Google Webmaster Tools
Search is a very important function of any web and mobile app project. Depending on the nature of the project emphasis on search needs to be implemented. For example for CMS sites search all content not just pages, post but also all custom objects. If it is an eCommerce implementation, then in addition to searching product catalog, static content and blog; we implement predictive/type ahead search, weight based/weighted search, etc.