Have you browsed to your website on your phone?
Does it look like this, truncated, difficult to read, and cut off?
Do you have to move from sideways as well as up and down to see what it is about?
Then your website is not device friendly and is not a responsive design.
Would a website like this grab your attention?
This image is from a responsive website design, it is easierr to read and easier to navigate You only have to move up and down to see the correctly proportioned content.
This website would be more likely to attract your attention.