For the benefit of feedback to the individual providing a response that solved your question as well as making it easier for people within the community when searching through prior posts for answers, it can be very helpful to mark a reply as a “Solution”.
This will place a green checkbox on that reply within the topic thread as shown below.
In addition a visible checkbox next to the top level Topic can be seen, indicating that a solution resides within.
To mark a reply as the solution, click the “Show More” icon to expand a list of choices.
Click the “This reply solves the problem” icon to mark the Topic as solved.