Final answer:
Stand Behind Me (Bodyguard) Tier 1 provides a 25% increase in Bodyguard Armor bonus, and at the start of combat, Bodyguards grant 100% of their Armor bonus to non-Bodyguard allies directly behind them. The update on 1/20/22 increased the Bodyguard Armor bonus by an additional 25%, with no mention of a health bonus being added.
Step-by-step explanation:
The effect of Stand Behind Me (Bodyguard) at Tier 1 in a gaming context, particularly for strategy or hero-based games where characters can have different abilities or roles, is that the Bodyguard Armor bonus increases by 25%. This means that characters with the Bodyguard role would get an increased Armor rating, which typically reduces incoming damage. At the start of combat, these Bodyguards extend protection to their allies by granting 100% of their Armor bonus to non-Bodyguard allies positioned directly behind them. This mechanic encourages strategic positioning of characters on the battlefield.
As for the additional change made in the 1/20/22 update, the information provided in the question suggests that there was an increase in the Bodyguard Armor bonus by another 25%. However, there is no mention of a health bonus being added in the update. This implies that the original effect of the ability was simply enhanced to provide more Armor to both the Bodyguard and the protected allies.