Question: I’m playing a grappling Eldritch Knight, and wanted to know if advantage on Strength checks (from the [*enlarge/reduce*](https://www.dndbeyond.com/spells/enlarge-reduce) spell) would make my grapple check - which is an Athletics check - have advantage.

Answer: 
Advantage on Strength checks gives advantage on grapples
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The rule for [grappling](https://www.dndbeyond.com/compendium/rules/basic-rules/combat#Grappling) says:

> 
> ...you try to seize the target by making a grapple check instead of an attack roll: a **Strength** (Athletics) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check...
> 
> 
> 

Emphasis mine.

*[Enlarge](https://www.dndbeyond.com/spells/enlarge-reduce)* gives advantage to all Strength checks, which include Strength (Athletics) checks.
I believe so
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When you initiate a [grapple](https://www.dndbeyond.com/compendium/rules/basic-rules/combat#Grappling), you do so by:

> 
> ... making a grapple check instead of an attack roll: a **Strength (Athletics) check** contested by the target’s Strength (Athletics) 
> 
> 
> 

Meaning that advantage on Strength checks does give you advantage when trying to grapple.