Responsive websites automatically adjust to the screen of any desktop, tablet, or smartphone. All of the content on the desktop version of a site is available to mobile devices of all sizes.
Since 2010, I have integrated dozens of web designs into various content management systems (CMS), including WordPress, Squarespace™, Drupal™, and HubSpot.
In mobile searches, Google™ penalizes sites that do not adjust to smartphones. A responsive redesign, hand-coded or integrated, is a smart solution.
Inconsistent display between different browsers-operating system combinations is due to incomplete testing during development or out-dated code.
A website that is properly optimized for search engines and usability is like having a representative who works 24 hours every day to sell your product.