I think this is harder to translate than it looks. Christine is right that avisera can mean advise. But that does not really work, because then the Swedish would say "We use IBS to advise ... our customers despatches" and that does not make sense. You do not advise the despatch, you advise the customer about the despatch.

So I think that what they really mean is that they uase IBS to regularly advise/inform/notify their customers about the various stages of progress of the goods despatches. There are various ways of doing that, but one common way (in the days when I worked in e-commerce) is to send a special message called a "Despatch Advice" or DESADV for short (which is why I spell it despatch, not dispatch).

The result is a rather clumsy English sentence, something like "We use IBS to send despatch advices, to track, to keep an eye on, and to check our customers' despatches."

For a common Despatch Advice message, see ref.