There are some useful steps to make a dotted text effect. It has very clear instruction to learn easily for the new comer. I hope you will enjoy.
New file: First Open an new file with white background as I have taken here.
Text formatting: Choose horizontal type tool (T key) and make formatting to write on the document.
Selection: Now select text tool by hold Ctr + mouse click.
Filter effect: Go to Filter menu > Sketch > halftone Pattern.
Layer style: Go to Layer menu > Layer style > Bevel and Emboss.
New Layer: Take a new layer and fill this color as I have done here.
Layer settings: Now make layer settings of the new layer as here.
This is the final result.
Recommend the tutorial