OK, so my bit about not using buzzwords seems to have failed.
Investigates: research. Means nothing
Selects: Purchases, decision maker
Drives: chauffeur. Means nothing
Development of products: Manufacturing
Online Acquisition: Purchasing. eBay is quite good for online acquisitions.
Improve brand: Means nothing
"Building some functionality for an app": if it doesn't have functionality it isn't an application.
"Some marketing activity": Standing on Regent's Street advertising a golf sale?
"Improve the customer journey": If you don't work in travel, customers don't go on journeys.
"Help increase transactions": Sell more.
So, you work in advertising/marketing.
Or do you work as an analyst who analyses all the above vapourware and then makes suggestions
Or are you working on the technology in the background, i.e. providing consultancy services around IT?