If we talk about istg ️ in text, the meaning is... I can assure you ️, the definition of istg ️ in text is... On a solemn note ️, the purpose of istg ️ in text is... From my heart ️, I tell you that the connotation of istg ️ in text is...
When sending a text message, istg ️ can mean... absolute certainty that is to say I'm not bluffing in addition to I'm really standing by my words . So, when someone uses istg ️ in a text message, it's an indication that they aren't exaggerating or being insincere.
Moreover, istg ️ can also be interpreted as I swear to Goodness in text messages. It is essentially a stronger expression of assurance. When someone uses istg ️ in a text, it demonstrates their unshakeable belief in what they are saying. To sum it up, when you come across istg ️ in a text message, you can interpret it as the person's way of convincing you that their statements are authentic and can be trusted.

ISTG ASL The 10 Most Confusing Abbreviations in the US