When it comes to PCB manufacturing, every point of information is counted together. Silkscreen layers have important visual information about component references, part numbers, test points, warning signs, manufacturer logos or markings.
In early stage of PCB manufacturing, when through hole design dominated the market, silkscreen was only used for easy component identification. Today, silkscreen layer with almost any color and font on any side of the board provides rich information.
Without silkscreen, PCB still can run smoothly. However, the correct design of the silkscreen on board can help the assembly process by providing references during manufacturing and final troubleshooting.
Silkscreen layer should be noted because when the designer put them in his favorite PCB design software, the components will be moved and rotated.
Determined by the software you use, when creating a new part, information like references, designations, values and markings will be automatically added to silkscreen layer layout. The additional text is linked to the part so it will shift and rotate along with it. Overlaps with other components can occur.
To make the silkscreen easy to read, you should always try to edit the direction of the text so that all text has the same orientation. This is true for the entire board, but in particular with information about a single component. Make sure that the new location does not overlap with the text of other components, pads, or vias. Manufacturers usually handle these conditions by not printing the affected area, especially in the case of a pad, but due to the printed silkscreen on the board, you may be unable to use the through hole as a test point.