Each of us has to learn to read again on the Internet. The right way to read most web pages is simply to scan the text. Is this Interesting? Is this useful? Then you need to decide what to do with it. I find the text on most web pages difficult to read. I choose to copy the text and print the pages I'd like to read. But I have a good, low cost printer, most people don't. Few web sites try to create screen readable pages as I try to do here.
After reading you decide if there is something of exceptional value on this page. If there is, how can you best capture that? Printed pages are easy, you can highlight the best parts of the text and file the page. This does create a paper war, but that can be managed.
If you can't easily print, write a note in your diary or journal. The simple act of making a note will help you to remember the key points.
It's easier to tell if something is really useful or not two or three weeks later. In that time much new data crosses your desk and that gives you a better perspective on the old data you collected. The process of sorting and categorising and filing the data helps you both to select the best material, and to learn it if you need too. This sorting process, throwing out a lot of paper, choosing the best, is an important non-trivial task.
When you have good data on a topic that interests you, opportunities will occur to offer your knowledge to others. If you do that in a social network or in a Toastmasters Club, or in your business network, people will give you feedback on your developing understanding. When your knowledge is new, finding the right words to express it can be difficult. Practice improves this ability.