I was not familiar with the acronym ETL and it is not explained anywhere in the website! My feedback would be to at least write it once, on the first instance so others like me will know what they are reading :)
Wikipedia:
https://en.m.wikipedia.org/wiki/Extract,_transform,_load
I'll just add:
It is a common term and practice among enterprise software users, i.e. generally medium or large companies that use packaged plus custom software for their business needs.
ETL is not common among startups, because they have a different focus, infrastructure and scale.
Extract, transform and load...
vs
ETL: Extract, transform and load data...
Extract, transform and load (ETL) data...
Extract, Transform and Load data...