Keep the original format means to keep the original format, font, color, shading, etc. of the content you copied; Matching the target format means that the content you copy matches the format of your document, that is, discarding the original format; Only retain the text means that the copied content is discarded except for the text, other colors, fonts, shading, etc., leaving only the text content.
Keep the source format as you copy it. Matching target format refers to automatically adapting to the format requirements of Word after copying to Word. To keep only the text is to copy only the text. Other formats, styles, and tables are removed. You will know what the effect is when you try all these.
