I sweep, vacuum and mop.
Hi Basanta. Begin by cleaning the floor with a broom or vacuum. Be sure to get all dust and dirt up. Then make a bucket with warm water and a small amount of mild all-purpose cleaner or dish soap. Avoid using cleaners with ammonia or vinegar as they may damage the sealant on your floor and bleed thru to the paint. Dunk a mop in this solution and wring it out thoroughly. Start mopping in one corner of the room and work on one 4-square-foot section at a time. Repeat until you make your way all around the room. When you're done, pour the solution down a drain and rinse the bucket and the mop. Fill the bucket with warm water and dunk the mop and wring it out. Start again in the same corner and mop the floor in 4-square-foot sections to rinse away any leftover soap. Rinse and wring out the mop after mopping each section. Good luck Basanta.
Here's a good article that might help: https://www.diynetwork.com/how-to/maintenance-and-repair/cleaning/how-to-clean-concrete-floors
I would use a natural soap like Sal Suds or soap, that stuff works for everything and just a bit goes a really long way.