Ya'akov Avinu from the Parsha of Toldot through to Vayishlach goes on a transformational journey. He begins as a quiet shepherd, seemingly content with a simple life. We also see him in what may be seen as deceptive behaviour, tempting his brother into selling his birthright and deceiving his father into believing that he is Esav. The following sources are an exploration of the word ויגש and its use with respect mainly to Ya'akov.
The word ויגש appears 9 times in the Torah [based on a Sefaria.org search]. 8 of them in Bereishit and once in Vayikra.
Ya'acov, usually reticent and passive understands the nature of his brother who is more pro-active. In order to convince his father that he is Esav he must act like him.
This is the first time Ya'acov shows his initiative and takes control of a situation. Note how this episode can be linked with the way his mother (Lavan's sister) watered the camels of Eliezer and how Moshe watered Yitro's flocks.
An important episode with Ya'acov's children. Yehuda takes responsibility for his brother Binyamin and retroactively for the sale of Yosef.
Despite Ya'acov being old and frail he is referred to as Yisrael, an indication of his inner strength which at times left him during his turbulent life, this is further emphasised by the use of the word ויגש.